Reply to Will and Hegselmann

1. Most importantly, they call attention to the need for replication of computational models. 2. They point out the importance of publishing source code and/or making the code publicly available. 3. They highlight the need for papers to have as much detail as possible about model assumptions, within the constraints of length (which has the additional benefit of keeping models simple enough to be explained in a few pages). 4. They point out details of our model that are inadequately explained in the paper. 5. They report monotonic effects of mobility on trust that are actually stronger than our own for the explanation we proposed for cross-cultural differences in trust—that mobility is higher in the U.S. than Japan.