Miklos Koren @korenmiklos Twitter profile

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Miklos Koren

@korenmiklos

2 months

I still have space left to display what’s playing. Hopefully not much longer.

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Miklos Koren

@korenmiklos

2 months

MacroModelling.jl by @kockerols provides a unified interface for DSGE modeling. Includes dynare. My fellow macroeconomists: No more excuses to stick to MATLAB. #juliacon2024

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Miklos Koren

@korenmiklos

9 months

It's official: I got an ERC Advanced Grant to study the macroeconomics of managers. I am really excited about this research agenda. What better way to kick off the project than the Empirical Management Conference at Stanford?

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Miklos Koren

@korenmiklos

8 months

This can indeed be super confusing. Which is why I wrote a Stata command to correct the event study coefficient after xthdidregress. Pick a baseline time period (-1 or any other) and report levels relative to that, not changes.

GitHub - codedthinking/eventstudy

Contribute to codedthinking/eventstudy development by creating an account on GitHub.

github.com

Jonathan Roth

@jondr44

8 months

Here's an illustration from a simple simulated DGP w/non-staggered timing and a linear violation of PT. TWFE shows a straight line. But some of the other methods show a kink or jump at the time of treatment

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Miklos Koren

@korenmiklos

5 years

Daughter comforting me after a journal rejection: "J K Rowling got rejected 12 times before publishing Harry Potter." #econtwitter #AcademicTwitter

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Miklos Koren

@korenmiklos

3 years

Want to please your coauthors? Use our @Stata style guide. Better yet, ask them to use it, too. > Koren, Miklós. (2021). CEU MicroData Stata Style Guide (1.0). Zenodo.

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Miklos Koren

@korenmiklos

3 years

We built a #wordle game from scratch in our @ceu #Python class. A completely enjoyable game in about 50 lines of code.

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Miklos Koren

@korenmiklos

2 years

I will be representing Team @Stata

Gabor Bekes

@GaborBekes

2 years

How about this. Really cool debate coming up on 6 December at @ceu ! Join in person or online! #STATA team: @korenmiklos + @martonfleck #Python team: @arieda_muco + Gayan Gadyan, #Rstats team: @grand_schemer + Zsuzsa Holler. +Yours truly, as MC.

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Miklos Koren

@korenmiklos

2 years

I never quite understood why @Stata users are so afraid of relative paths. Among the hundreds of .do files I review regularly, only a handful do not hard code their absolute path in the code. 1/n

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Miklos Koren

@korenmiklos

3 years

This is so good, @cameron_pfiffer .

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Miklos Koren

@korenmiklos

4 years

My favorite @Stata trick is to balance a panel by reshaping twice: reshape wide employment, i(tax_id) j(month); reshape long. What is yours?

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Miklos Koren

@korenmiklos

1 year

How to make your research reproducible from day 1? We are doing a workshop with @AeaData @larsvil at the @EEANews congress: We will start with an empty folder and do a mini-project together. Join us in Barcelona on August 28.

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Miklos Koren

@korenmiklos

2 months

There are tradeoffs in using different programming languages. @mschoberml Some make you happy, some make you fast. I will also feature a Pareto frontier in my Kezdi.jl talk tomorrow.

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Miklos Koren

@korenmiklos

3 months

Fő állításaink: 1. Karácsony legtöbb szavazója tiszás. 2. Vitézy legtöbb szavazója fideszes. 3. A 24e érvénytelen szavazatból kb 18ezret a Fidesz szavazói adtak le.

Min múlt Karácsony győzelme?

Megvan, kik szavaztak ilyen nagy számban Vitézyre, és a részletes adatokból az is kiderül, miben nem követték Magyar Pétert a választói. A szavazóköri adatokból rajzolódik ki, mi döntötte el minden...

444.hu

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Miklos Koren

@korenmiklos

3 years

Our @PLOSONE paper with Rita Pető on social distancing is my first where we followed reproducible research practices from the start. Here are the steps we took, the tools we used, and how they helped us later. An #econtwitter thread on tooling. 1/n

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Miklos Koren

@korenmiklos

2 years

The data editors of @aeadata , @EJ_RES , @reveconstudies , @canjecon , and @InquiryWEAI launch the Data and Code Availability Standard DCAS describes an appropriate replication package and helps authors comply with journals' data and code availability policies

Launching DCAS

The data editors of the journals of the American Economic Association1, of the Royal Economic Society2, the Review of Economic Studies, the Canadian Journal of Economics, and Economic Inquiry have...

datacodestandard.org

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Miklos Koren

@korenmiklos

6 years

1. Working with data requires coding skills in most jobs: academia, policy, consulting or business analytics. So the question is not whether we teach students to code, but when and how.

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Miklos Koren

@korenmiklos

2 years

Results are in after the @CEU debate about @Stata , #RStats and #Python . Not many people changing camps. Most changes are from R to Python. @Stata fans are loyal.

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Miklos Koren

@korenmiklos

3 years

@AeaData If you are a Stata user and not sure where the root of your project folder is, use this:

GitHub - korenmiklos/here: Stata package roughly replicating the behavior of the R library "here"

Stata package roughly replicating the behavior of the R library "here" - korenmiklos/here

github.com

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Miklos Koren

@korenmiklos

3 years

Awesome work by @friosavila , @AsjadNaqvi and @pedrohcgs , v0.1 of DRDID for @Stata released: Submit issues there if you encounter any bugs.

GitHub - friosavila/csdid_drdid: Repository for the implementation of csdid and drdid

Repository for the implementation of csdid and drdid - friosavila/csdid_drdid

github.com

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Miklos Koren

@korenmiklos

4 months

The answer is 5%. Data cleaning (replace, collapse, egen, and the like) and programming (local, if, foreach, and the like) take up 88% of commands. The rest is exploratory data analysis (tabulate, summarize) and plotting. #EconTwitter

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Miklos Koren

@korenmiklos

1 year

Achievement unlocked. My paper with Caselli, Lisicky and Tenreyro is cited in the Economic Report of the President.

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Miklos Koren

@korenmiklos

6 months

I did a horse race of Python, Julia, Rust and DuckDB for some simple string matching. To my surprise, Python comes out winning. If you can improve your favorite language’s performance, submit a PR. All code written by ChatGPT.

GitHub - korenmiklos/levenshtein-benchmarks

Contribute to korenmiklos/levenshtein-benchmarks development by creating an account on GitHub.

github.com

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Miklos Koren

@korenmiklos

2 years

16 rules for sharing code and data. All endorsing journals ask the same. Some rules are harder than others, but data editors help you meet them.

Data and Code Availability Standard

A standard for sharing research code and data, endorsed by leading journals in social sciences.

datacodestandard.org

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Miklos Koren

@korenmiklos

2 years

This is a bit annoying, but no reason to write code that does not reproduce on someone else's computer. Please use relative paths: 4/4

GitHub - korenmiklos/relative-path

Contribute to korenmiklos/relative-path development by creating an account on GitHub.

github.com

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Miklos Koren

@korenmiklos

4 months

Analyzing 250 Stata replication packages submitted to @RevEconStudies . 4k do files, 799k lines of code. What fraction of commands you think are estimation commands like regress or reghdfe? #EconTwitter

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30-40%

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Miklos Koren

@korenmiklos

4 months

@jaredcrubin With my Stata package eventbaseline (on ssc), you can pick your base period for event study graphs. Relative to -3 there is no effect. You can also use baseline(average), to express all ATTs relative to the average of the pretreatment periods.

GitHub - codedthinking/eventbaseline

Contribute to codedthinking/eventbaseline development by creating an account on GitHub.

github.com

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Miklos Koren

@korenmiklos

3 years

Make feels like a secret weapon: helps productivity enormously, yet very few economists use it. I have been meaning to to create a short free course on Make to share this secret. Give me a nudge by signing up. #EconTwitter

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Miklos Koren

@korenmiklos

2 years

Now that the Stata-R-Python debate is over, I can be non-partisan about this topic. A long thread. Python won. Congrats to @arieda_muco and Gayan Gadyan. 1/

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Miklos Koren

@korenmiklos

1 year

Most courses at @ceu econ are switching to #Python . We are looking for a cloud platform that best serves our students. If you have a favorite, please edit directly on GitHub. @arieda_muco @GaborBekes @kissoliver91

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Miklos Koren

@korenmiklos

2 months

And we’re a go!

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Miklos Koren

@korenmiklos

4 years

"Take a walk" (or run, in my case) does it, all the time.

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Miklos Koren

@korenmiklos

4 months

Stata allows command names to be abbreviated. Some of the longer ones are almost always shortened by users. This is a bad practice because the short names are inconsistent and hard to read. Some of the abbreviation rules are arcane and confusing…

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Miklos Koren

@korenmiklos

3 years

I think @JuliaLanguage 's motto should be "Come for the performance, stay for the extendability." It's great that you show multiple dispatch early on.

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Miklos Koren

@korenmiklos

2 months

Kezdi.jl lets you roll your own functions to be used in any of its Stata-like commands. Every command can be executed on a subset of the data like ‘ @replace y = 5 @if y < 5” The 10x speed is just a bonus.

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Miklos Koren

@korenmiklos

4 years

Do you work in applied theory, financial economics, or applied machine learning? We have three open tenure-track positions at @ceu Economics in Vienna. #EconTwitter

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Miklos Koren

@korenmiklos

5 years

@betanalpha "I cannot, for the life of me, figure out why this paper was written." Other referees also had issues with our motivation, but did not put it so eloquently.

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Miklos Koren

@korenmiklos

1 year

Super helpful intro to @JuliaLanguage macros by @MoseGiordano . I'v been playing with Julia for some time, but haven't really understood :() $() and esc() until now

My first macro in Julia

This post isn’t about the first macro I wrote in the Julia programming language, but it can be about your first macro. Frequently Asked Questions Question: What are macros in Julia? Answer: Macros...

giordano.github.io

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Miklos Koren

@korenmiklos

2 years

I redid our sample @Stata code from last week in @JuliaLanguage . An annotated solution:

Add Julia sample code · korenmiklos/stata-debate@0d5b4f5

github.com

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Miklos Koren

@korenmiklos

5 years

@economeager This is my defense of Big-O notation: there is always a large enough problem for which you cannot just buy a faster computer.

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Miklos Koren

@korenmiklos

1 year

Learning and loving Tidier.jl by @kdpsinghlab . Even though I never used R, I agree with the decision to copy a well-designed and popular interface. @mutate (log_gdp = log(gdp)) is pretty readable.

GitHub - TidierOrg/Tidier.jl: Meta-package for data analysis in Julia, modeled after the R tidyve...

Meta-package for data analysis in Julia, modeled after the R tidyverse. - TidierOrg/Tidier.jl

github.com

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Miklos Koren

@korenmiklos

1 year

Getting caught by both the reproducibility police and the typography police.

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Miklos Koren

@korenmiklos

2 months

Coming soon.

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Miklos Koren

@korenmiklos

5 months

Building something exciting in @JuliaLanguage for applied microeconomists. If you’d like to shape it, please make your voice heard at our initial design meeting

Initial design meeting · Issue #16 · codedthinking/Kezdi.jl

With @gergelyattilakiss we are building a Julia package to help typical applied economics workflows for data cleaning, as well as exploratory and regression analysis. The syntax follows that of Sta...

github.com

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Miklos Koren

@korenmiklos

3 years

My colleagues say I have conservative views about big data. I love collecting new sources of data, but strongly believe in applying the old-school rules of statistics and economics.

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Miklos Koren

@korenmiklos

5 months

I shouldn’t be doing this while preparing for my talk, but my ADHD got the better of me. Here’s how insanely fast @duckdb is. @AsjadNaqvi

DuckDB demo

Recorded by korenmiklos

asciinema.org

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Miklos Koren

@korenmiklos

2 months

using Pkg; Pkg.add(“Kezdi”) and keep the stars coming

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Miklos Koren

@korenmiklos

2 months

How do you check the schedule of JuliaCon? By running JuliaCon.jl, of course:

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Miklos Koren

@korenmiklos

2 years

OpenAI can help faculty too, not just students.

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Miklos Koren

@korenmiklos

3 years

@DSchindlerEcon "This is not the question you should be asking. Why don't you ask X instead?"

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Miklos Koren

@korenmiklos

2 years

I am too slow for science. Before I even had time to read "your favorite DSGE sucks," it is debunked. This is peak #EconTwitter @JoshuaBrault3 , I'll use your reanalysis in today's macro class!

Joshua Brault

@JoshuaBrault3

2 years

Instead, what you’ll find is that the volatility of variables in the simulated data from their code is dramatically lower than what you find from DYNARE. The attached image is simulated output growth using identical calibrations.

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Miklos Koren

@korenmiklos

8 months

@_adasgupta It is a nontrivial task for the authors. Which is why as data editors ( @AeaData , @JoanLlull_econ @FlorianOswald Marie Connolly, @maiaguell ), we recommend keeping your code and documentation in shareable state from “day 1.”

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Miklos Koren

@korenmiklos

2 months

#juliacon2024 is at the stadium of PSV Eindhoven. Finally Julia and football coming together?

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Miklos Koren

@korenmiklos

2 years

Our very own @ceu "Stata vs R vs Python" debate. Please watch responsibly. No more dunking on Stata!

Stata vs R vs Python - What Should I Master to Analyze Data?

Α hybrid event, organized in partnership with the Vienna Data Science Group and the Vienna Applied Micro Economics Network.The core of the event was a discus...

www.youtube.com

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Miklos Koren

@korenmiklos

6 years

@ClausWilke @NPR If Dr is reserved for those who do actual doctoring, Judge should be reserved for those who have actual judgement.

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Miklos Koren

@korenmiklos

2 months

Those of #EconTwitter at @JuliaConOrg , make yourselves known in the comments.

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Miklos Koren

@korenmiklos

5 years

After a great workshop at U Vienna, checking out the new campus of @ceuhungary .

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Miklos Koren

@korenmiklos

2 months

@mhsatman @kockerols So recipe for economists: if field == “macro” Pkg.add(“MacroModelling”) elseif field == “applied micro” Pkg.add(“Kezdi”) end

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Miklos Koren

@korenmiklos

5 years

My colleagues and I are giving a "Data Wrangling for Economists with @Stata " workshop at the @EEANews conference. This is a pilot @datacarpentry workshop. Apply by July 25

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Miklos Koren

@korenmiklos

4 months

Some of the capital goods of my production process.

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Miklos Koren

@korenmiklos

2 months

What happens when you compile a piece of @JuliaLanguage code? This graph is critical for writing a good Stata compiler for Kezdi.jl

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Miklos Koren

@korenmiklos

4 years

Which businesses suffer most from social distancing? We built a model and analyzed O*NET and CBP data to find businesses relying on F2F communication and physical presence. In the U.S., 49 million workers are in affected occupations. 1/4

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Miklos Koren

@korenmiklos

2 months

My treat for myself from Holland. Good things come with age.

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Miklos Koren

@korenmiklos

7 months

Super excited that my aspirational submission to JuliaCon got in. Now we have to build it. It will be awesome.

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Miklos Koren

@korenmiklos

4 years

@PHuenermund I love it. No-nonsense (~MATLAB-like) syntax with multidimensional arrays in a proper programming language. Fast, too, especially in parallel. Here are some code examples we used in a 1st-year macro class:

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Miklos Koren

@korenmiklos

3 years

Applying for an @ERC_Research ? Join the @yacadeuro webinar on November 11 about how the first round of evaluation works.

ERC Starting Grant Mentoring Event Part 2 - Evaluation/Shortlisting - Young Academy of Europe

On 11th November 2021, between 14:00-16:00 CET, the Young Academy of Europe (YAE) in collaboration with the Academia Europaea (AE) Budapest Knowledge Hub will host an event for researchers who are...

yacadeuro.org

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Miklos Koren

@korenmiklos

4 years

Can go from opening Twitter to opening a bottle of wine.

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Miklos Koren

@korenmiklos

4 months

Great discussion today with Stata and Julia fan colleagues in preparation for this package.

Tidier.jl

@Tidierjl

4 months

👀

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Miklos Koren

@korenmiklos

3 years

@AeaData Fully agree. You want to use relative paths so that your coauthors can also run the code. But `cd` wreaks havoc with relative paths (relative to where, again?). Run all your code from the root of the project folder.

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Miklos Koren

@korenmiklos

4 years

@KirbyKNielsen Deleting old files that are no longer needed.

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Miklos Koren

@korenmiklos

6 years

1+2+3= We need to teach coding first, as part of literacy. Focusing on applications with zero statistics: web scraping, basic text processing. Only then teach statistics, when all students are comfortable power users of their computers.

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Miklos Koren

@korenmiklos

4 years

Járvány, városok és gazdaságpolitika. Hosszú beszélgetésem az @Azonnali1 -val.

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Miklos Koren

@korenmiklos

4 years

Know bash, git or Stata? Come help out at the @EEANews @datacarpentry workshop August 23-24. Due to strong interest, I need more helpers who assist learners in debugging problems they encounter during live coding. All online, join for as much as you can.

Data Carpentry recruitment

Turn data collection into an experience with Typeform. Create beautiful online forms, surveys, quizzes, and so much more. Try it for FREE.

mikloskoren.typeform.com

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Miklos Koren

@korenmiklos

2 months

I got phished. Got a message in AirBnB about an upcoming trip. Credible URL, credibly cute mixture of Slovak and English. Asked for some details about the trip. had the basics already filled in. Like what time we are arriving. Then asked for a credit card. 1/

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Miklos Koren

@korenmiklos

2 years

I am crying tears of joy. This saves so much time. Also endangers the business model of Google, StackOverflow, etc. 1/2

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Miklos Koren

@korenmiklos

3 months

Even if you cheat before recording any research data, DataColada will still catch you.

[117] The Impersonator: The Fake Data Were Coming From Inside the Lab - Data Colada

A previous version of this post was supposed to go live in January 2019. But the day before it was scheduled, the Data Colada team (Uri, Leif, and Joe) received an email that we took to be a potent...

datacolada.org

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Miklos Koren

@korenmiklos

7 years

Tremendous support pouring in for CEU. Amazing people. Amazing support. We are HONORED. Keep CEU Strong!

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Miklos Koren

@korenmiklos

5 years

Trade is good, even for volatility. The average country has 36% lower GDP variance in 2007 than in 1972 because of lower trade costs.

QJE

@QJEHarvard

5 years

#QJE Feb 2020 #9 : “Diversification Through Trade,” by Caselli, Koren ( @korenmiklos ), Lisicky, and Tenreyro:

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Miklos Koren

@korenmiklos

2 months

Infiltrator.jl looks awesome to debug your Julia code. You can stop at any point and get a REPL to look around.

GitHub - JuliaDebug/Infiltrator.jl: No-overhead breakpoints in Julia

No-overhead breakpoints in Julia. Contribute to JuliaDebug/Infiltrator.jl development by creating an account on GitHub.

github.com

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Miklos Koren

@korenmiklos

1 year

There are already 16 journals endorsing the Data and Code Availability Standard, more to come soon.

Journals

A standard for sharing research code and data, endorsed by leading journals in social sciences.

datacodestandard.org

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Miklos Koren

@korenmiklos

7 years

Apply now and next year #seeuatceu

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Miklos Koren

@korenmiklos

2 months

I’ve stood on stages before but never this big. Kezdi.jl talk is live at 3pm.

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Miklos Koren

@korenmiklos

3 years

One of my favorite data science coding books has a new edition! With a chapter on Make!! And the book is free!!! How cool is that?

Jeroen Janssens

@jeroenhjanssens

3 years

🎉 The second edition of Data Science at the Command Line is out! 🎉 You can read the entire book for free at It took a good year to rewrite and expand the first edition, so I'd like to say a few things. 🧵

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Miklos Koren

@korenmiklos

1 year

@arieda_muco @Stata OpenAI should ask Nick Cox for a complete training data for @Stata

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Miklos Koren

@korenmiklos

3 years

An exciting paper by @atrisovic et al studies R code published in ~2000 replication packages. Only 25% of them run out of the box. About a third of the others can be fixed by two easy changes. Can you guess what these two changes are?

A large-scale study on research code quality and execution

This article presents a study on the quality and execution of research code from publicly-available replication datasets at the Harvard Dataverse repository. Research code is typically created by...

arxiv.org

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Miklos Koren

@korenmiklos

4 years

@nickchk No, but replication packages should be more prominent.

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Miklos Koren

@korenmiklos

4 years

Tomorrow I will deliver my first online class at @CEUhungary . It will be crude and glitchy at first, but if you would like to learn about the Dornbusch-Fischer-Samuelson model, you are welcome to join at 9am Budapest time:

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Miklos Koren

@korenmiklos

6 years

2. Students don’t appreciate tools without seeing the benefits. Teaching coding with “hello world” and “1+1=2” is pointless.

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Miklos Koren

@korenmiklos

2 months

Early @JuliaLanguage memories ahead of @JuliaConOrg next week. I started with 0.4. Rewrote the whole codebase for a macro paper from Matlab. Lot of work, but two orders of magnitude faster and better code quality. When the revision came around, upgraded to 0.6. —

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Miklos Koren

@korenmiklos

1 year

There are some demonstrations and counter-demonstrations in Vienna about a drag queen storytime for kids. I think the city has spoken.

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Miklos Koren

@korenmiklos

3 months

I’m working on a Julia project of reasonable complexity and, man, we would be dead without unit tests.

Carl Vellotti

@carlvellotti

3 months

All unit tests passed.

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Miklos Koren

@korenmiklos

6 months

I am old enough to have started email with PINE. If you’re looking for a distraction free email client, I have good news for you. It still works.

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Miklos Koren

@korenmiklos

5 years

Hungarian Election Office: We spent huge amounts on our great new website. Users after polls close: Let's check the results. Hungarian Election Office: Oops.

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Miklos Koren

@korenmiklos

2 months

Come and grab your Kezdi.jl sticker at #juliacon2024 We will be on the REPL stage Friday 3pm.

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Miklos Koren

@korenmiklos

4 years

@VollCornHirsch @FiveThirtyEight No, because the uncertainty in @FiveThirtyEight model has been calibrated to polls, not results. Unless they retrain the model in real time, even their conditional prediction (what if Biden wins Arizona) will be way off.

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Miklos Koren

@korenmiklos

1 year

@eje612 it’s still in development so if you have questions or comments, please create an issue on GitHub.

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Miklos Koren

@korenmiklos

5 months

I have a Sachverständiger coauthor. Go @julianhinz !

Kiel Institute (IfW Kiel)

@kielinstitute

5 months

Zur Frage der Wirtschaftsbeziehungen zwischen 🇩🇪 und 🇨🇳 war @julianhinz gestern als Sachverständiger im Bundestag. Abhängigkeit nicht so groß ist, wie oft angenommen & kommuniziert. Details👉 📺Aufzeichnung der Anhörung 👉

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Miklos Koren

@korenmiklos

6 years

@katewaldock @Noahpinion I agree we learn/teach very little about *how* research is done. Leaving students to learn by doing can be very frustrating. I believe the how is also teachable.

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Miklos Koren

@korenmiklos

4 years

@rlmcelreath A key misunderstanding in scientific computing is that software engineering best practices are only for large-scale production systems. Wrong. These practices shine not when the exact same code runs a zillion times, but when code has to be changed often. Exactly like in science.

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Miklos Koren

@korenmiklos

2 years

I recently remarked to colleagues that the 80s were great. This is what I had in mind:

Diego Maradona (Opus - Live is Life) (1989) UEFA CUP Semi-Final...

The song was played in the stadium ... SSC Neaple vs. FC Bayern Munich (4:2)Opus - "Live is Life"He make this moves with "OPEN SHOES" ! ...WTF !?!?I tried it...

www.youtube.com

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Miklos Koren

@korenmiklos

9 months

One rarely sees an application where Simpson's paradox actually works.

Dondena Centre

@DondenaCentre

9 months

Salvatore Lattanzio tells an alternative angle of the story the declining gender pay gap in Italy and the US: Convergence is driven by men's fall closer to women.

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