Increasing and decreasing returns describes what happens when:

Correct Answer

D) Successive investments eventually add less than they cost

Why this is correct: The principle of increasing and decreasing returns describes the relationship between capital invested in improvements and the resulting change in property value. As explained, each added dollar of improvement initially contributes value at an increasing rate. Eventually, a point is reached where additional investment adds less value than it costs, marking the transition to decreasing returns. This is the 'turning point' where an improvement becomes an over-improvement, a key consideration in highest and best use analysis. Why the other choices are wrong: 'Neighborhood boundaries expand outward' describes external growth or change, not the return on a specific capital investment. 'Property values rise steadily over time' refers to general appreciation or market trends, not the marginal return from successive improvements. 'Interest rates fluctuate during the investor's holding period' relates to financing costs and market conditions, not the principle of returns from capital invested in the property itself. Exam tip: Remember, this principle is about the *marginal return* of each new dollar spent on improvements, not overall market movement.