Final answer:
The quantitative importance of U.S. protection of the domestic clothing industry lies in its role as a significant employer of low-skilled labor, the job losses despite protectionist measures, and the increased costs to consumers, especially impacting low-wage workers.
Step-by-step explanation:
The quantitative importance of U.S. protection of the domestic clothing industry is best explained by the understanding that this industry is an important employer of low-skilled labor. Protectionism in the textile and apparel industry, through tariffs and import quotas, has a significant impact on U.S. jobs and consumers. Despite these protectionist measures, the U.S. has still experienced a large decline in textile and apparel jobs, with the U.S. Bureau of Labor Statistics (BLS) estimating a 42% decline from 2007 to 2012, which is expected to continue. These jobs are often low-skilled positions that are crucial for a segment of the workforce. Furthermore, protectionism leads to higher clothing costs, which disproportionately affect low-wage workers who spend a larger portion of their income on basic necessities like clothing.