This meta-study by Christoph Engel reviews over 100 dictator game experiments published in the past 25 years. The study aims to summarize the evidence on how much dictators are willing to give to recipients and to explore the effects of various manipulations on generosity. The meta-analysis uses multiple regression to assess the impact of single manipulations while controlling for alternative explanatory factors, providing a rich dataset for comparing different statistical models. The results show that dictators, on average, give 28.35% of the pie, with a left-skewed distribution, where a significant portion gives nothing. Key findings include the positive effect of social control, such as social cues and social proximity, and the negative effect of social distance. Demographic factors, such as age, gender, and country of origin, also significantly influence generosity. The study concludes with a multiple regression analysis, which explains almost half of the variance in giving behavior, highlighting the importance of age, multiple recipients, and recipient need and legitimacy.This meta-study by Christoph Engel reviews over 100 dictator game experiments published in the past 25 years. The study aims to summarize the evidence on how much dictators are willing to give to recipients and to explore the effects of various manipulations on generosity. The meta-analysis uses multiple regression to assess the impact of single manipulations while controlling for alternative explanatory factors, providing a rich dataset for comparing different statistical models. The results show that dictators, on average, give 28.35% of the pie, with a left-skewed distribution, where a significant portion gives nothing. Key findings include the positive effect of social control, such as social cues and social proximity, and the negative effect of social distance. Demographic factors, such as age, gender, and country of origin, also significantly influence generosity. The study concludes with a multiple regression analysis, which explains almost half of the variance in giving behavior, highlighting the importance of age, multiple recipients, and recipient need and legitimacy.