sentences:  Suburbanization in tandem with deindustrialization, human migration, and the 2008 Great Recession all contribute to origins of shrinking cities in the U.S. Scholars estimate that one in six to one in four cities worldwide are shrinking in countries with expanding economies and those with deindustrialization.However, there are some issues with the concept of shrinking cities, as it seeks to group together areas that undergo depopulation for a variety of complex reasons.These may include an aging population, shifting industries, intentional shrinkage to improve quality of life, or a transitional phase, all of which require different responses and plans.