Which factor does NOT directly influence aggregate demand?

Aggregate demand is influenced by the total demand for goods and services within an economy at a given overall price level and in a given time period. The components that contribute to aggregate demand include consumer spending, net exports, and government spending.

Consumer spending directly affects aggregate demand because it represents the total expenditure by households on goods and services, which is a key component of GDP. Net exports, which is the difference between a country's exports and imports, also play a significant role as it reflects the demand for domestic goods in the global market. Increased government spending can stimulate aggregate demand by injecting money into the economy for public projects, services, and welfare programs.

In contrast, fixed market prices do not directly influence aggregate demand. These prices can affect market dynamics by determining how resources are allocated, but they do not inherently represent a component of the demand itself. Fixed market prices can lead to distortions in supply and market signals, but they do not modify the fundamental components driving aggregate demand like consumer and government expenditures or net exports do.