According to a model where population growth increases with income and average income decreases with population size, an economy reaches a point where average income is just enough for the population to sustain itself. At this point, the population growth rate becomes zero, and with no change in population, the average income also remains constant. This condition, where the internal forces of the economy are in balance and resist change, is known as a ________ equilibrium.
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Consider an economy in a Malthusian equilibrium, where the average income is precisely at the subsistence level, and the population size is stable. If a one-time, exceptionally favorable weather event leads to a temporary increase in agricultural output and raises the average income above the subsistence level, what will be the long-term consequence according to the model's self-correcting mechanism?
Long-Run Effects of a Temporary Policy Change
In an economy at a Malthusian equilibrium, the inherent drive of the population to gradually improve productivity through minor innovations is sufficient, on its own, to create a permanent escape from the subsistence income level.
An economy is initially in a stable equilibrium where average income is at the subsistence level. A one-time technological improvement causes a temporary increase in agricultural productivity, pushing average income above the subsistence level. According to the model's internal logic, arrange the following events in the correct chronological order to show how the economy self-corrects and returns to a subsistence-level income.
Economic Recovery After a Population Shock
Stability of Subsistence Income
For an economy where population growth is positively related to average income and average income is negatively related to population size, match each economic state with the dynamic pressure it creates within the system.
According to a model where population growth increases with income and average income decreases with population size, an economy reaches a point where average income is just enough for the population to sustain itself. At this point, the population growth rate becomes zero, and with no change in population, the average income also remains constant. This condition, where the internal forces of the economy are in balance and resist change, is known as a ________ equilibrium.
An economy is operating in a stable state where the population size is constant and the average income is just enough for subsistence. According to the internal logic of this economic model, which of the following events would most likely lead to a permanent escape from this subsistence-level income, rather than just a temporary deviation followed by a return to the original state?
Evaluating an Economic Model's Explanatory Power