portfolio equity is regressed on a variable Lane and Milesi-Ferretti call “Stock Return.” That variable is defined as “the weighted average of stock returns on individual markets, as reported by MSCI, where the weights reflect the country’s allocation of portfolio equity assets as reported in the IMF 1997 Portfolio Survey.” In other words, it is measuring exactly the same thing that real return on portfolio equity is trying to measure—the return on each country’s portfolio of equities. It uses an entirely different measure of returns from an entirely different data source