I believe that their should be some sort of checks and balances for the changes in economic status. I was about six turns into a war when a recession appeared! In most cases, warfare stimulates the economy, adds thousands of jobs and pushes manufacturing to its' limits. Therefore, the chance of recession during wartime should be very, VERY slim. To balance that out, in the first year after a war ends, either through a peace treaty or conquering another race, the chance for a recession should be much higher, as the factories shut down and terminate employees as the wartime production ceases. This would be a much more realistic response of the economy to warfare conditions. War is always good at two things: strengthening the economy and thinning the population.