As far as wages are concerned, the only difference between immigration and birth is that birth takes longer.

Writing on the blog, you want to get attention and make strong claims. In academic work, that often doesn't pay, so sometimes it's a little bit difficult going back and forth to navigate these differences.

Hollywood wants its heroes to be virtuous, but it defines virtue in a way that excludes any action that is self-interested. If virtue means putting others ahead of self, then it's clear that most people, let alone most capitalists, aren't very virtuous.

More retirees, longer life expectancy, larger benefits, and fewer workers - these trends have meant substantial increases in the payroll tax. Since the social security program began, the payroll tax has increased more than 500 percent.

Democracy is an experimental system. I like it when states try out new ideas. I think we ought to expand, not contract, our federalist system.

America has the highest standard of living of any major country in the entire world. To maintain and enhance that standard of living, America should continue to embrace those qualities which have made America great: openness and dynamism. Openness to new technologies, new ideas and new people is America's greatest source of strength.

Education is the key to the future: You've heard it a million times, and it's not wrong. Educated people have higher wages and lower unemployment rates, and better-educated countries grow faster and innovate more than other countries. But going to college is not enough. You also have to study the right subjects.