Although the fashion industry developed first in Europe and America, as of 2017, it is an international and highly globalized industry, with clothing often designed in one country, manufactured in another, and sold worldwide. For example, an American fashion company might source fabric in China and have the clothes manufactured in Vietnam, finished in Italy, and shipped to a warehouse in the United States for distribution to retail outlets internationally. The fashion industry has long been one of the largest employers in the United States, and it remains so in the 21st century. However, U.S. employment declined considerably as production increasingly moved overseas, especially to China. Because data on the fashion industry typically are reported for national economies and expressed in terms of the industry's many separate sectors, aggregate figures for world production of textiles and clothing are difficult to obtain. However, by any measure, the clothing industry accounts for a significant share of world economic output. The fashion industry consists of four levels:
^ Park, Jennifer. "Unisex Clothing". Encyclopedia of Clothing and Fashion. Ed. Valerie Steele. Vol. 3. Detroit: Charles Scribner's Sons, 2005. 382–384. Gale Virtual Reference Library. Web. 22 Sept. 2014. Document URL http://go.galegroup.com/ps/i.do?id=GALE%7CCX3427500609&v=2.1&u=fitsuny&it=r&p=GVRL.xlit.artemisfit&sw=w&asid=6f171eb2ab8928b007d0495eb681099c
The pace of change accelerated considerably in the following century, and women and men's fashion, especially in the dressing and adorning of the hair, became equally complex. Art historians are therefore able to use fashion with confidence and precision to date images, often to within five years, particularly in the case of images from the 15th century. Initially, changes in fashion led to a fragmentation across the upper classes of Europe of what had previously been a very similar style of dressing and the subsequent development of distinctive national styles. These national styles remained very different until a counter-movement in the 17th to 18th centuries imposed similar styles once again, mostly originating from Ancien Régime France. Though the rich usually led fashion, the increasing affluence of early modern Europe led to the bourgeoisie and even peasants following trends at a distance, but still uncomfortably close for the elites – a factor that Fernand Braudel regards as one of the main motors of changing fashion.