Dan Zeltzer
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Negative Control Falsification Tests for Instrumental Variable Designs Open
The validity of instrumental variable (IV) designs is typically tested using two types of falsification tests. We characterize these tests as conditional independence tests between negative control variables -- proxies for unobserved varia…
Replication data for: Challenging Encounters and Within-Physician Practice Variability Open
Challenging Encounters and Within-Phyisician Variability Practice DATA
Drug Diffusion through Peer Networks: The Influence of Industry Payments Open
Pharmaceutical companies market to physicians through individual detailing accompanied by monetary or in-kind transfers. Large compensation payments to a small number of physicians account for most of this promotional spending. Studying US…
Sex Differences in the Pattern of Patient Referrals to Male and Female Surgeons Open
In this cross-sectional, population-based study, male physicians appeared to have referral preferences for male surgeons; this disparity is not narrowing over time or as more women enter surgery. Such preferences lead to lower volumes of a…
Do Urgent Care Centers Reduce Medicare Spending Open
We ask how urgent care centers (UCCs) impact healthcare costs and utilization among nearby Medicare beneficiaries. When residents of a zip code are first served by a UCC, total Medicare spending rises while mortality remains flat. In the s…
The Impact of Increased Access to Telemedicine Open
We estimate the impact of increased access to telemedicine that followed widespread adoption during the March-April 2020 lockdown period in Israel (due to .We focus on the post-lockdown period, which in Israel was characterized by a tempor…
Do Urgent Care Centers Reduce Medicare Spending? Open
We examine the impact of the opening of a new urgent care center (UCC) on health care costs and the utilization of care among nearby Medicare beneficiaries.We focus on 2006-2016, a period of rapid UCC expansion.We find that total Medicare …
Replication data for: Why is End-of-Life Spending so High? Evidence from Cancer Patients Open
Replication code for Why is End-of-Life Spending so High? Evidence from Cancer Patients.
Supply-Side Variation in the Use of Emergency Departments Open
We study the role of person-specific and place-specific factors in explaining geographic variation in emergency department (ED) utilization using detailed data on 150,000 patients who moved regions within Israel.We document that about half…
Why is End-of-Life Spending So High? Evidence from Cancer Patients Open
The concentration of healthcare spending at the end of life is widely documented but poorly understood.To gain insight, we focus on patients newly diagnosed with cancer.They display the familiar pattern: even among cancer patients with sim…
Characteristics of Private Equity–Owned Hospitals in 2018 Open
LettersFebruary 2021Characteristics of Private Equity–Owned Hospitals in 2018Joseph Bruch, BA, Dan Zeltzer, PhD, and Zirui Song, MD, PhDJoseph Bruch, BAHarvard T.H. Chan School of Public Health, Boston, Massachusetts (J.B.), Dan Zeltzer, P…
Direct-to-Consumer Chat-Based Remote Care Before and During the COVID-19 Outbreak Open
Objective To compare the patient population, common complaints, and physician recommendations in direct-to-consumer chat-based consults, before and during the COVID-19 outbreak. Data sources Data on patient characteristics, patient complai…
Gender Homophily in Referral Networks: Consequences for the Medicare Physician Earnings Gap Open
I assess the extent to which the gender gap in physician earnings may be driven by physicians’ preference for referring to specialists of the same gender. Analyzing administrative data on 100 million Medicare patient referrals, I provide r…
Can targeting high-risk patients reduce readmission rates? Evidence from Israel Open
We study a large intervention intended to reduce hospital readmission rates in Israel. Since 2012, readmission risk was calculated for patients aged 65 and older, and high-risk patients were flagged to providers upon admission and after di…
Drug Diffusion Through Peer Networks: The Influence of Industry Payments Open
Pharmaceutical companies market to physicians through individual detailing accompanied by monetary or in-kind transfers.Large compensation payments to a small number of physicians account for most of this promotional spending.Studying US p…