As the world entered the twenty-first century, global skill shortages in many occupations were evident throughout the world. While these were mitigated by a global recession, there is no generally agreed upon method for measuring these shortages. This book discusses various theories for measurement. Using data collected from 19 developed countries in North and Latin America, Europe, and the Pacific region, the authors explore various aspects of skilled labor shortages, develop a methodology of measuring shortages by occupation, and provide estimates of the likelihood of the occurrence of such shortages. They develop labor market indicators which measure the degree of shortage or surplus in different occupations.