Final answer:
Recessions in the 19th century were often triggered by the collapse of financial institutions and resulted in a general pullback of investment spending. Concepts such as economies of scale, rapid expansion, financing with borrowed money, and lagging consumer demand played a role in these recessions.
Step-by-step explanation:
Economic theory often assumes an ideal world without frictions and instant adjustment to shocks. However, in the real world, there are frictions and lags in adjustment. In the second half of the 19th century, repeated recessions occurred, often triggered by the collapse of financial institutions and resulting financial panics.
These recessions can be explained using concepts such as economies of scale, a race by firms to be the largest in an industry, rapid expansion of industrial capacity, financing expansion with borrowed money, lagging consumer demand, business failures, bank failures, panic, and a general pullback of investment spending.