It's been a long week with the holiday in the U.S. meaning that I am a behind in my posting, but I wanted to offer a link to some in-process papers and soon to be book on international differences in entrepreneurship which NBER organized.  In particular, I think these papers are interesting for the variety of data which the scholars used in their analyses and approaches taken to get data to be more defensible by other mainstream academics.  The Lusardi and Ardagna paper is a great example of how the authors took some fairly heterogeneous data in the Global Entrepreneurship Monitor and parsed it down to the most robust subset for the questions they were asking.