Hagen, Tobias; Waldeck, Stefanie - 2014
-sectional analyses. This paper takes a step toward estimating of causal effects of milk consumption on cancer by applying panel …-country variation in a panel of up to 50 countries for 1990 to 2008. Possible methodological problems arising from omitted variables … (confounding factors), heterogeneity, and outliers are carefully discussed and a wide range of recent panel econometric estimators …