Answer to Question 1
A consumer's consumption possibilities are limited by the consumer's income and the prices of the goods. The consumer is unable to consume limitless quantities of goods and services because the consumer must pay a price for each good or service consumed and the consumer's income is limited. If the consumer's income increases and/or the prices of the goods and services fall, the quantity of goods and services the consumer can afford increases, thereby increasing the consumer's consumption possibilities.
Answer to Question 2
A player's best response is not the same as his dominant strategy. A best response is simply one player's optimal choice, taking the other player's action as given. In other words, a best response gives a player a payoff that is at least as large as the payoff from any other strategy she has available. However, when a player has the same best response to every possible strategy of the other player(s), then we say that the player has a dominant strategy.
Relative Energy Consumption per Person for Selected Countries
Race-Ethnicity and Income Extremes
Natural Resource Prices, 1850–2010
Relationship between Income Inequality and Sociopolitical Instability
Relationship Between Income per Capita and Population Growth
Social scientists have not done well at devising theories to explain lovely romantic moments