Book excerpt: In 2013, more than 197,000 individuals have been surveyed and approximately 3,800 national experts on entrepreneurship participated in the study across 70 economies, collectively representing all global regions of the world and a broad range of economic development levels. The samples in the GEM 2013 study represent an estimated 75% of the world's population and 90% of the world's total GDP. In addition to its annual measures of entrepreneurship dynamics, GEM analyzed well-being as a special topic in 2013.