In economics, secular stagnation is a condition when there is negligible or no economic growth in a market-based economy. In this context, the term secular means long-term (from Latin "saeculum"—century or lifetime), and is used in contrast to cyclical or short-term. It suggests a change of fundamental dynamics which would play out only in its own time. The concept was originally put forth by Alvin Hansen in 1938. According to The Economist, it was used to "describe what he feared was the fate of the American economy following the Great Depression of the early 1930s: a check to economic progress as investment opportunities were stunted by the closing of the frontier and the collapse of immigration". Warnings of impending secular stagnation have been issued after all deep recessions since the Great Depression, but the hypothesis has remained controversial. Definition The term secular stagnation refers to a market economy with a chronic (secular or long-term) lack of demand. Historically, a booming economy with low unemployment and high GDP growth (i.e., an economy at or above capacity) would generate inflation in wages and products. However, an economy facing secular stagnation behaves as if it is operating below capacity, even when the economy appears to be booming; inflation does not appear. In a healthy economy, if household savings exceed business investments, interest rates fall; lower interest rates stimulate spending and investment, which bring savings and investments into balance. However, an economy facing secular stagnation may require an interest rate below zero to bring savings and investment into balance. The surplus of savings over investment may be generating price appreciation in financial assets or real estate. For example, the U.S. had low unemployment but low inflation in the years leading up to the Great Recession, although a massive housing bubble developed. The idea of secular stagnation dates back to the Great Depression, when some economists feared that the United States had permanently entered a period of low growth. The Economist explained in 2018 that many factors may contribute to secular stagnation, by either driving up savings or reducing investment. Households paying down debt (i.e., deleveraging) increase savings and are spending less; businesses react to the lack of demand by investing less. This was a major factor in the slow U.S. GDP growth during 2009-2012 following the Great Recession. Another possible cause is income inequality, which shifts more money to the wealthy, who tend to