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This paper develops a dynamic model of retail competition and uses it to study the impact of the expansion of a new national competitor on the structure of urban markets. In order to accommodate substantial heterogeneity (both observed and unobserved) across agents and markets, the paper first develops a general framework for estimating and solving dynamic(More)
BACKGROUND Get With The Guidelines (GWTG)-Stroke is a national stroke registry and quality improvement program. We examined the accuracy and reliability of data entered in GWTG-Stroke. METHODS Data entered by sites in the GWTG-Stroke database were compared with that abstracted from de-identified medical records by trained auditors. Accuracy for each(More)
This paper provides a method of estimating dynamic discrete choice models (in both single-and multi-agent settings) in which time is a continuous process. The advantage of working in continuous time is that state changes occur sequentially, rather than simultaneously , eliminating a substantial curse of dimensionality that arises in multi-agent settings.(More)
This paper establishes conditions for nonparametric identification of dynamic optimization models in which agents make both discrete and continuous choices. We consider identification of both the payoff function and the distribution of un-observables. Models of this kind are prevalent in applied microeconomics and many of the required conditions are(More)
BACKGROUND The implementation of Target: Stroke Phase I, the first stage of the American Heart Association's national quality improvement initiative to accelerate door-to-needle (DTN) times, was associated with an average 15-minute reduction in DTN times. TARGET Stroke phase II was launched in April 2014 with a goal of promoting further reduction in(More)
This dissertation consists of three chapters relating to identification and inference in dynamic microeconometric models including dynamic discrete games with many players, dynamic games with discrete and continuous choices, and semiparametric binary choice and duration panel data models. The first chapter provides a framework for estimating large-scale(More)
BACKGROUND Heterotopic ossification (HO) develops after nearly 2/3 of traumatic blast amputations in the contemporary battlefield. This phenomenon has potentially devastating consequences for servicemen and women and its pathophysiology warrants further investigation using a previously developed animal blast model. QUESTIONS/PURPOSES We asked, what is the(More)