Score contribution per author:
α: calibrated so average coauthorship-adjusted count equals average raw count
We first develop a theory-based metric to judge the popularity of value weighting in a stock market. We then use our metric to document that although value weighting is less popular in emerging markets than in developed markets, its popularity is increasing almost everywhere. Finally, as we have better data for the United States, we explore why value weighting is becoming more popular in the United States.