Ineffective fundraising lowers the resources charities can use for goods provision. We combine a field experiment and a … causal machine-learning approach to increase a charity's fundraising effectiveness. The approach optimally targets … fundraising to individuals whose expected donations exceed solicitation costs. Among past donors, optimal targeting substantially …

In this paper we present the Ifo Investment Database, which provides annual investment data for 12 investment assets in … allows allocating investments by asset type to each industry, using an investment flow matrix. The database enables … investments. We describe the structure and methodology of the database and illustrate its variety and strengths by looking at some …

I present the first database of historical local population figures for all Germany. The German Local Population … Database (GPOP) includes total population in 1871, 1910, 1939, 1946, 1961, 1987, 1996, 2011, and 2019 for the universe of all … German municipalities, counties, and states at consistent contemporary boundaries (31 December 2019). The database was hand …

FamData is a database covering family businesses and non-family businesses across various size classes and branches …,000 companies. In addition to the "hard" business data like turnover and number of employees, the database also includes "soft …