You are the Economist of the office of Community Development at UCLA. In 2015, you implemented a program of entrepeneurship in LA. Your design was such that the western region was offered that program, while the eastern region was not. The key variable that measures the performace of the program is the percentage of self-employed people.

You collected information regarding self-employment before and after the program, and the average percentage of self-employed people in each population is summarized in the Table below

inside of () is one value:

             West.       East.

2014.    (0.21).     (0.20)

2016.    (0.29).     (0.23)

(a) Compute the change in self-employment in the West and East, respectively.

(b) Calculate the difference of this change (obtained above) between the West and East. What will be the effect of the program in self-employment? Interpret.