"An increase in the share of workers with an H-1B visa within an occupation, on average, reduces the unemployment rate in that occupation. The results indicate that a 1 percentage point increase in the share of workers with an H-1B visa in an occupation reduces the unemployment rate by about 0.2 percentage points. The findings suggest the presence of H-1B visa holders boosts employment among other workers in an occupation. The results provide no evidence that the H-1B program has an adverse impact on labor market opportunities for U.S. workers"

There is nothing scientific about this. No experiment was performed. They simply looked at the data, saw there was lower unemployment in occupations with higher percentage of h1b, and then asserted that means there is no evidence that the program has an adverse impact on us workers. They are reversing cause and effect.

Do you have a study that shows the adverse impact of H1-B visas on American workers?

Soft sciences are harder than hard sciences to do.

> No experiment was performed. > This is not a double blind experiment

Do you really think experiments are a reasonable approach to political questions?

I too dislike wish-washy science, but there really isn’t much other choice for many real world situations.