Picked just 4 years? That sounds awfully sus. Like if you include 1998 or 2005 to the numbers still hold? How about 1990 to 2025? I'm not saying they are wrong,

Picked just 4 years? That sounds awfully sus. Like if you include 1998 or 2005 to the numbers still hold? How about 1990 to 2025? I'm not saying they are wrong, in fact I want to believe they are right. But so many econ papers are easy to tear down just by including a little more data.