Forecasting The Next Recession Based On The Calendar And The Presidency

Will 2017 bring a recession? The calendar says it's likely.

The Great Recession officially ended in June 2009, 7-1/2 years ago. That is already a long time without a recession. Since 1900, the US has stayed out of a recession longer only two other times: the 1960s (9 years) and the 1990s (10 years).

There have been 23 recessions since 1900, and 21 of them have taken place within 8-1/2 years of the prior one's end. So, the historical odds based on the calendar say the next recession is likely to start in 2017 (21/23 = 91%).

Notably, the time between recessions has been expanding over time. At the turn of the 20th century, recessions took place very other year. They now take place nearly every other decade. Consider the following:

Between 1900 and 1928: a recession every 1 year and 10 months.
Between 1929 and 1949: a recession every 3 years and 8 months.
Since 1950: a recession every 5 years and 9 months.
Since 1990: a recession every 8 years.



If you are thinking that recessions used to be short and shallow and now they are less frequent but deeper, you are exactly wrong. GDP fell 5% during the Great Recession. Between 1880 and 1928, economic activity fell an average of about 20% with each recession. At least 3 were worse than the Great Depression.

It's worth stressing that the timing of each recession has little to do with the election of a new president. Before Truman, at least one recession began during every presidency. Since then, there have been 5 presidencies where a recession never started after their election until they left office (Truman, Kennedy, Johnson, Clinton, Obama). In other words, in the past 67 years, in only about half of the presidencies has a new recession started (6/11 = 55%).

The following table lists every newly elected president in the past 120 years and the time between their inauguration and the start of the next recession. Based on this, the next recession either started a year ago or will not occur at all during the Trump presidency. That is not a very useful predictor.

Using only two term presidencies substantially lowers the sample size but doesn't change the result. Prior to Obama, there have only been 6 complete two term presidencies since Ulysses S. Grant 140 years ago (Wilson, FDR, Eisenhower, Reagan, Clinton and Bush). That's a small sample and in two cases a recession did not start during the term of the next elected president (Truman and Kennedy). Those odds are approaching random.