North America metropolitan area by population in North America: Greater Mexico City. Canada also breaks into the top ten largest metropolitan areas with the Toronto metropolitan area having six million people. The proximity of cities to each other on the Canada–United States border and Mexico–United States border has led to the rise of international metropolitan areas. These urban agglomerations are observed at their largest and most productive in Detroit–Windsor and San Diego–Tijuana and experience large commercial, economic, and cultural activity. The metropolitan areas are responsible for millions of dollars of trade dependent on international freight. In Detroit-Windsor the Border Transportation Partnership study
Population Association of America As of 2013, there are about 3,000 members. The PAA is a partner in the Science and Technology Fellowship Program of the American Association for the Advancement of Science. Population Association of America The Population Association of America (PAA) is a non-profit scientific professional association dedicated to the study of issues related to population and demography. According to the website of the History Committee of the Population Association of America, the PAA was conceived on December 15, 1930 at a meeting in the office of Henry Pratt Fairchild at New York University. It was an offshoot of the American National