...One of the analyses, released by the National Bureau of Economic Research on Monday, offers the first detailed estimates of how a policy of mass deportation would affect specific industries. The authors, Ryan Edwards and Francesc Ortega of Queens College, City University of New York, came up with a few unexpected results...

...If all undocumented workers were immediately removed from the country, Edwards and Ortega forecast a decline of 9 percent in agricultural production and declines of 8 percent in construction and leisure and hospitality over the long term...

...Edwards and Ortega estimate that undocumented workers are responsible for about 3 percent of the U.S. economy overall. Deporting all of them would result in a substantial contraction.