Here is the summary
Manufacturing has continued to grow, and the sector itself remains a large, important, and growing sector of the U.S. economy. Employment in manufacturing has stagnated for some time, primarily due to growth in productivity of manufacturing production processes.
Three factors have contributed to changes in manufacturing employment in recent years: Productivity, trade, and domestic demand. Overwhelmingly, the largest impact is productivity. Almost 88 percent of job losses in manufacturing in recent years can be attributable to productivity growth, and the long-term changes to manufacturing employment are mostly linked to the productivity of American factories. Growing demand for manufacturing goods in the U.S. has offset some of those job losses, but the effect is modest, accounting for a 1.2 percent increase in jobs beyond what we would expect if consumer demand for domestically manufactured goods was flat.
Exports lead to higher levels of domestic production and employment, while imports reduce domestic production and employment. The difference between these, or net exports, has been negative since 1980, and has contributed to roughly 13.4 percent of job losses in the U.S. in the last decade. Our estimate is almost exactly that reported by the more respected research centers in the nation.
Manufacturing production remains robust. Productivity growth is the largest contributor to job displacement over the past several decades. This leads to a domestic policy consideration.
Short reading with plenty of data. You can read the entire thing here.