What are some good predictors of high unemployment?

The Bureau of Labor Statistics has unemployment rates going back to 1948 http://data.bls.gov/timeseries/LNS14000000 so let's look at some 1948-2014 data.

A) Years Republicans led the House, Senate and White House averaged 13% lower unemployment than years Democrats had all three (p<0.25)

B) Sorting those years by Federal spending/GDP ratio: The high-spending half averages 36% higher unemployment that the low-spending half. (p<0.0025)

C) Sorting those years by real per-capita revenue to the Treasury: The high-revenue half averages 20% higher unemployment that the low-revenue half. (p<0.15)

D) Sorting years by minimum-wage and splitting as close to the middle as possible: With minimum-wage of $3.10 or less, unemployment averaged 19% lower than at $3.35 or more. (p<0.0020)

So, decreasing GOP policy control, raising taxes, increased spending and high minimum-wage are all known PREDICTORS of rising unemployment.

What OTHERS are you aware of? ANY that Democrats don't demand?