Maggie Shi @maggieshi311 Twitter profile

Last Seen Profiles

@momona733516235

@MichaelTibollo

@vocesdecocle

@kalyanssk

@manga_prd

@yama_zo

@AmonVAL_

@Jeremiah_Rich6

@geyr_

@ArslanAli19061

@mo_multiopticas

@stw_pdg

@Rujijo_

@n3mu1_ooO

@REO934

@itizuniharuto

@KathyMi83012961

@CremoniniCesare

@mearic

@triggerevery1

@eddy_sarah

@Hayabusa082322

@Tk_believer9597

@DetectiveFUT

@annn_Ss92

@smalltiddyemogf

@Curatedmusic

@Hakim91___

@MedicineHatNews

@LucasTrivedi13

@info_ingmar

@Guvenel3

@NABJMN

@DaniNastase

@Columbuos

@gabxtsl

Maggie Shi

@maggieshi311

11 months

Thrilled to see this out soon in the @QJEHarvard !

QJE

@QJEHarvard

11 months

Recently accepted by #QJE , “Monitoring for Waste: Evidence from Medicare Audits,” by Maggie Shi ( @maggieshi311 ):

0

23

101

15

13

200

Maggie Shi

@maggieshi311

3 years

I'm on the job market, so it's time for a JMP thread! 🧵 #EconTwitter I study a Medicare monitoring program that at its peak reclaimed 1% of inpatient stay revenue. I find major savings from deterred stays, no pt health effects, BUT private compliance costs to achieve savings

1

27

130

Maggie Shi

@maggieshi311

3 years

Hello, #EconTwitter ! Excited to share [my first!] Working Paper Thread!🧵👇 In this paper, @talgross , @asacarny , David Silver, and I ask: how do hospitals respond to increases in payment rates? We find: they increase admissions, reduce length of stay, and increase scale. 1/6

1

9

100

Maggie Shi

@maggieshi311

2 years

Excited to see my first ever publication out in @restatjournal , with @talgross , @asacarny , and David Silver!

The Review of Economics and Statistics (REStat)

@restatjournal

2 years

Raising hospital payment rates led them to admit more patients while shortening lengths of stay. Just Accepted new paper by Tal Gross ( @talgross ), Adam Sacarny ( @asacarny ), David Silver, Maggie Shi ( @maggieshi311 )

0

7

36

3

9

90

Maggie Shi

@maggieshi311

1 year

Please circulate to any applicants interested in working on healthcare regulation with Zarek and me!

Zarek Brot-Goldberg

@zarekcb

1 year

Myself and @maggieshi311 are jointly hiring a Research Professional (read: predoc RA) at the Becker-Friedman Institute at Chicago starting July 1 on health econ topics. Please circulate to qualified applicants! Application: @econ_ra @predoc_org

1

36

69

0

23

35

Maggie Shi

@maggieshi311

3 years

Excited for #SHESG2021 tomorrow! (And Truffles says thanks for the shoutout for her hard work as an RA 😂)

Southeastern Health Economics Study Group

@SEHealthEcon

3 years

Good morning! Let us introduce you to Maggie Shi ( @maggieshi311 ), an Economics Ph.D. candidate at Columbia University. Maggie will be presenting at #SHESG2021 on Friday. Maggie is on the job market this year - so take a moment to check out her web page at

1

7

45

1

33

Maggie Shi

@maggieshi311

3 years

Excited to present my job market paper at @ashecon today in the Health Systems and Health Care Financing Emerging Scholar Session today at 11. Thanks @jeanniebin for organizing this fantastic lineup with papers by @parker_rog , @AJHolmgren , and Kun Li!

2

32

Maggie Shi

@maggieshi311

2 years

#ASHEcon22 if you’re curious how insurers deal with incomplete contracts with providers, come to our session tomorrow morning at 10:15!

2

5

28

Maggie Shi

@maggieshi311

3 years

Thanks @jenniferdoleac for your hard work promoting JMCs each year! It is much appreciated.

Jennifer Doleac

@jenniferdoleac

3 years

Maggie Shi JMP: "The Costs and Benefits of Monitoring Providers: Evidence from Medicare Audits" Website:

1

13

59

0

1

19

Maggie Shi

@maggieshi311

2 years

Ft. work on medical necessity, denials, and surprise billing by @ashdgandhi @rileyleague @BenChartock , and discussion by @ryanmcdevitt @A_Schwa @ambarlaforgia

0

8

Maggie Shi

@maggieshi311

2 years

Been looking forward to @parker_rog 's *fantastic* JMP, which seeks to answer a core economic question: how does regulation affect innovation and firm behavior? He focuses on an important and heavily-regulated industry: medical devices. Check it out!

Parker Rogers

@parker_rog

2 years

How does FDA regulation affect innovation and market concentration? #EconTwitter In my JMP, I show that deregulation: -⬆️innovation by as much as 400% -⬆️firm entry by 1000% -⬇️prices by 40%. In some cases, deregulation drives product safety innovation. More details:

16

195

655

1

0

9

Maggie Shi

@maggieshi311

3 years

And as a personal side note, I’m really happy I got to work with Tal, David, and Adam on this paper. I learned a *lot*, from navigating the world of Medicare policy, working with claims data, and refining the final draft. Not to mention, they are a fun lot to work with!

0

8

Maggie Shi

@maggieshi311

3 years

Looking forward to presenting in the "Cost of Healthcare" session today -- thanks @APPAM_DC for organizing a great seminar series!

APPAM

@APPAM_DC

3 years

What's that? TODAY is the third day of our month-long Student Research Seminar Series? That's great! Register for free and join us for some world-class research from our student members at 1PM Eastern!

0

1

6

0

2

8

Maggie Shi

@maggieshi311

3 years

Full paper & one-page summary are available at . Thanks for reading!

Maggie Shi

Welcome to my website! I am an assistant professor at the University of Chicago Harris School of Public Policy and a Faculty Research Fellow at the National Bureau of Economic Research. In my...

www.maggie-shi.com

0

5

Maggie Shi

@maggieshi311

3 years

So how did hospitals respond to these higher rates (or conversely, lower rates)? They increased the number of patients they admitted. Once these patients were admitted, hospitals got them out the door faster with shorter lengths of stay. 4/6

1

0

5

Maggie Shi

@maggieshi311

3 years

I use new admin data from a FOIA request on the Recovery Audit Contractor program and link it to Medicare claims, hospital cost reports, and IT adoption data. RACs started auditing inpatient stays for medical necessity in 2011 --> increase in audits and payments reclaimed.

1

5

Maggie Shi

@maggieshi311

11 months

I’m indebted to my advisors for supporting me through every stage of this project @wwwojtekk @asacarny @myklebest & Pietro Tebaldi.

1

0

5

Maggie Shi

@maggieshi311

3 years

The takeaway is that hospital care follows a traditional, upward-sloping supply curve, with an elasticity of about 1. And this supply response is something policymakers should take into account when considering policies that change hospital payment rates. 6/6

1

0

4

Maggie Shi

@maggieshi311

4 years

Looking forward to this session tomorrow! @ashecon

0

4

Maggie Shi

@maggieshi311

3 years

We exploit a 2007 reform which refined the payment system to better reflect the cost to treat different patients. Hospitals with relatively sicker pre-reform patient mixes stood to gain with this reform via higher average payment rates. 3/6

1

0

4

Maggie Shi

@maggieshi311

2 years

@prinzdani @valezurla Thanks Daniel!!

0

3

Maggie Shi

@maggieshi311

3 years

Hospitals managed to do this by increasing their scale — the number of beds, full-time employees, and nurses employed all rise. We don’t find evidence that patient mortality or readmissions increase. 5/6

1

0

3

Maggie Shi

@maggieshi311

3 years

Why do we care? Many recent value-based hospital reforms (e.g. HRRP) incentivized hospitals by tying payment rates to performance measures. This begs the question, how do hospitals respond to just changes *in payment rates themselves*? 2/6

1

0

3

Maggie Shi

@maggieshi311

11 months

I’m incredibly grateful to the editor @S_Stantcheva and the referees for their great (and very speedy!) feedback during the revision process. The final version has improved so much since the submission, and along the way I learned a lot about my own paper.

1

0

3

Maggie Shi

@maggieshi311

3 years

Ungated link:

1

0

3

Maggie Shi

@maggieshi311

3 years

Putting it all together: increased monitoring by RACs is welfare-improving due to substantial savings, but there is scope to find ways to reduce providers' compliance costs. For every $1000 in Medicare savings, hospitals incur $216 in admin costs.

1

0

3

Maggie Shi

@maggieshi311

3 years

#ASHEcon2021

0

2

Maggie Shi

@maggieshi311

3 years

@jamie_daw @columbia_econ Thanks Jamie!

0

2

Maggie Shi

@maggieshi311

3 years

@anne_m_burton Thanks, Anne!

0

2

Maggie Shi

@maggieshi311

3 years

@winikoff_econ Ha! The ultimate tbt. Thanks Justin!!

0

2

Maggie Shi

@maggieshi311

3 years

@agoodmanbacon Thanks Andrew!

0

2

Maggie Shi

@maggieshi311

3 years

I then use variation across patients from a 2013 rule which effectively increased audit rates for patients arriving at the ED after midnight (the Two Midnights rule). Hospitals reduce inpatient admissions for after-MN arrivals, but they're not more likely to revisit the hospital.

1

0

2

Maggie Shi

@maggieshi311

11 months

And finally I’m grateful to the countless peers and mentors who have been so generous with their time and were willing to read every single version of this paper!

0

2

Maggie Shi

@maggieshi311

3 years

I first use variation across hospitals in the aggressiveness of the firm in charge of their region, before and after 2011. More auditing deters stays, especially for lower necessity stays. But hospitals incur admin costs & install IT to detect med. necessity.