Publications

In online advertising markets, advertisers often purchase ad placements through bidding in repeated auctions based on realized viewer information. We study how budget-constrained advertisers may compete in such sequential auctions in the presence…

Machines are increasingly doing “intelligent” things. Face recognition algorithms use a large dataset of photos labeled as having a face or not to estimate a function that predicts the presence y of a face…

In this paper we develop new methods for estimating causal effects in settings with panel data, where a subset of units are exposed to a treatment during a subset of periods, and the goal is estimating counterfactual (untreated) outcomes for the…

The contextual bandit literature has traditionally focused on algorithms that address the exploration-exploitation tradeoff. In particular, greedy algorithms that exploit current estimates without any exploration may be sub-optimal in…

Historically, the literature on money management has not consistently applied the rational expectations equilibrium concept. We explain why and summarize recent developments in the money management literature that do apply this concept correctly…

How natural disasters affect politics in developing countries is an important question, given the fragility of fledgling democratic institutions in some of these countries as well as likely increased exposure to natural disasters over time due to…

We develop a class of algorithms, as variants of the stochastically controlled stochastic gradient (SCSG) methods , for the smooth nonconvex finite-sum optimization problem. Only assuming the smoothness of each component, the complexity of SCSG…

How people think about and use their time has critical implications for happiness and well-being. Extant research on time in the consumer behavior literature reveals a predominantly dichotomized perspective of time between the present and future…

This opening chapter of the Handbook of Heroism and Heroic Leadership offers insights and inspiration about the zenith of human behavior. The contributions to this volume offer a sturdy foundations for the development of a…

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Social outliers draw a lot of attention from those inside and outside their group and yet little is known about their impact on perceptions of their group as a whole. The present studies examine how outliers influence observers’ summary…

Crowd-based organizational models are purported to be more open and participatory than traditional organizational forms. But are they novel inventions or permutations of forms that have existed previously? This essay examines the wide array of…

Word embeddings are a powerful approach for analyzing language, and exponential family embeddings (EFE) extend them to other types of data. Here we develop structured exponential family embeddings (SEFE), a method for discovering embeddings that…

Forthcoming in American Economic Review

We estimate the causal effect of sovereign default on the equity returns of Argentine firms. We identify this effect by exploiting changes in the probability of Argentine sovereign default…

Purpose – This chapter provides a framework that captures the fundamental impacts of power at the individual, dyadic, small group, and organizational levels. Within each level, we trace the psychological, cognitive, and behavioral consequences of…

Stanford Biodesign launched its Innovation Fellowship in 2001 as a first-of-its kind postgraduate training experience for teaching biomedical technology innovators a need-driven process for developing medical technologies and delivering them to…

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