Compares the performance of startups with that ofestablished firms in order to investigate whether overoptimism plays a criticalrole in the entrepreneur’s decision to found a firm. Three aspects ofperformance are considered: the likelihood of achieving commercial sales, thelikelihood of...

The development of metropolitan areas is likely to depend, among other things, on the development of their entrepreneurial communities. However, our understanding of entrepreneurial communities worldwide is limited. In the following note, we begin to fill this gap by providing data on the...