We compare the performance of two approaches for finding the optimal set of products to display to customers landing on Alibaba's two online marketplaces, Tmall and Taobao. Both approaches were placed online simultaneously and tested on real customers for one week. The first approach we test is...

We present evidence of significant bias in event studies that investigate the effect of U.S. monetary policy on U.S. stock prices. To overcome this bias, we propose a new identification method based on the "Impossible Trinity" theory which argues that an economy with a fixed exchange rate and...

This paper attempts to identify how monetary policy shocks affect stock prices by using Mundell and Fleming's theory of the "Impossible Trinity". According to this theory, it is impossible to simultaneously have a fixed exchange rate, free capital movement (an absence of capital controls), and...