The Life Satisfaction Index (LSI) is a widely used measure of economic happiness. It is based on surveys that ask people to rate their overall satisfaction with their lives on a scale from 0 to 10.

Climate is not a determinant of economic happiness. Income, health, and social relationships are all important determinants of economic happiness.

The Easterlin Paradox states that economic happiness increases at a decreasing rate as income increases. This means that as people get richer, they experience less additional happiness from each additional dollar of income.

Increasing GDP is not a policy implication of the psychology of economic happiness. The other options are all policy implications of the psychology of economic happiness.

The Theory of Social Comparison states that people's happiness is determined by their comparison of their own situation to the situations of others.

Imaginary comparison is not a type of social comparison. Upward comparison, downward comparison, and lateral comparison are all types of social comparison.

The Hedonic Treadmill is the phenomenon that occurs when people's happiness decreases after they experience a positive event. This is because people quickly adapt to positive events and start to take them for granted.

Eating a healthy diet is not a strategy for increasing economic happiness. The other options are all strategies for increasing economic happiness.

The Theory of Expectancy Theory states that people's happiness is determined by their expectations. This means that people who have high expectations for their lives are more likely to be happy than people who have low expectations for their lives.

Negative emotions are not a factor that contributes to subjective well-being. Positive emotions, life satisfaction, and purpose in life are all factors that contribute to subjective well-being.

The Contrast Effect is the phenomenon that occurs when people's happiness increases after they experience a negative event. This is because people compare their current situation to their previous situation and find that it is better than they expected.

Material well-being is not a type of economic happiness. Subjective well-being, psychological well-being, and social well-being are all types of economic happiness.

The Theory of Social Support states that people's happiness is determined by their social relationships. This means that people who have strong social relationships are more likely to be happy than people who have weak social relationships.

Getting involved in politics is not a strategy for increasing social well-being. The other options are all strategies for increasing social well-being.

The Theory of Meaning in Life states that people's happiness is determined by their sense of purpose in life. This means that people who have a strong sense of purpose in life are more likely to be happy than people who do not have a strong sense of purpose in life.