Read article with grain of salt because the author is currently working for The American Enterprise Institute, which is a well known right-wing entity that is paid to produce "research" and propaganda.

Also, evaluating the merits of the piece itself, I notice it's very carefully worded to imply a certain thing which is not actually backed up by facts or independent evidence, nor does it make an effort to separate correlation from cause. Which is a common hallmark of propaganda. For example, there may very well be a rise in businesses leaving California, but it could also be the case there's a rise in businesses coming into California, or starting up inside of California, or it may actually be a good thing that they're leaving, or even if it is bad in isolation there are other good things that come from it that are more than worth it. Overall, not a serious or trustable piece.