The Engel Curve illustrates the relationship between the quantity of a specific good a consumer purchases and their income level, assuming all other factors (like prices and preferences) remain constant.
Therefore, the Engel Curve denotes the various amounts of a good that a consumer is willing to purchase at various income levels.
| LIST-I | LIST-II |
| 1. Absolute Advantage | a. Paul Rosenstein Rodan |
| 2. Theory of Big Push | b. Adam Smith |
| 3. Theory of low level Equilibrium trap | c. Richard R. Nelson |
| 4. Balanced Growth Theory | d. Ragner Nurkse |