Shoppers report that 39% of their holiday gift-purchases are for someone “picky.” However, despite the ubiquity shopping picky people, little research has examined how people choose gifts people. In present research, we define “picky gift recipient” as perceived to have narrow and unpredictable preferences, show alters giving behavior. We find although norms prescribe givers spend effort, time,...

Abstract We analyze machine learning algorithms for stock selection. Our study builds on weekly data the historical constituents of S&P500 over period from January 1999 to March 2021 and typical equity factors, additional firm fundamentals, technical indicators. A variety models are trained binary classification task predict whether a specific outperforms or underperforms cross‐sectional me...