Set-asides and subsidies are used extensively in government procurement and resource
sales. We analyze these policies in an empirical model of US Forest Service timber auctions. …

Online controlled experiments (OCEs), also known as A/B tests, have become ubiquitous in
evaluating the impact of changes made to software products and services. While the concept …

Classical statistical inference of experimental data assumes that the treatment affects the
test group but not the control group. This assumption will typically be violated when …

We present a new equilibrium search model where consumers initially search among discount
opportunities, but are willing to pay more as a deadline approaches, eventually turning to …

We consider the problem of variance reduction in randomized controlled trials, through the
use of covariates correlated with the outcome but independent of the treatment. We propose a …

Identifying the same internet user across devices or over time is often infeasible. This
presents a problem for online experiments, as it precludes person-level randomization. …

Using a large set of private health insurance claims, we estimate how physicians' financial
incentives affect their treatment choices in heart attack management. Different insurance …

We introduce a new, simple‐to‐compute test of independence of valuations and the number
of bidders for ascending button auctions with symmetric, conditionally independent private …

We present a method for implementing shrinkage of treatment effect estimators, and hence
improving their precision, via experiment splitting. Experiment splitting reduces shrinkage to a …

This subject of this dissertation is applied microeconometrics. Chapter 1 estimates the effect
of physician incentives on treatment choices in heart attack management. Our results …