Is it better to have more corporations?

A reduction in the corporate income tax burden encourages adoption of the C corporation legal form, which reduces capital constraints on firms. Improved capital reallocation increases overall productive efficiency in the economy and therefore expands the labor market. Relative to the benchmark economy, a corporate income tax cut can reduce the non-employment rate by up to 7 percent.

That is from the new AEJ: Macroeconomics, by Daphne Chen, Shi Qi, and Don Schlagenhauf.