Which of the following economic metrics is evaluated using the Gini Coefficient?

The correct option is Income disparity.

Step-by-step Explanation:

1. Understanding the Gini Coefficient:
The Gini Coefficient (or Gini Index) is a statistical measure developed by Italian statistician Corrado Gini in 1912. It is widely used in economics to measure the degree of inequality in the distribution of income or wealth within a population.

2. How it Works:
The coefficient ranges from 0 to 1 (or 0% to 100%):
- A Gini coefficient of 0 represents maximum/perfect equality, where everyone in a population has the exact same income.
- A Gini coefficient of 1 (or 100%) represents maximum/perfect inequality, where one single individual holds all the income while everyone else receives nothing.

3. Relationship to the Lorenz Curve:
Graphically, the Gini coefficient is calculated using the Lorenz Curve, which plots the cumulative percentage of total income earned against the cumulative percentage of the population.
If

$A$

$B$

$\text{Gini Coefficient}=\frac{A}{A+B}$

4. Evaluating the Options:
- Joblessness rate: Measured by unemployment rates, not the Gini coefficient.
- Income disparity: Directly measured by the Gini coefficient to assess distribution of wealth/income inequality across a nation or group.
- Inflationary pressure: Measured by indices like the Consumer Price Index (CPI) or Wholesale Price Index (WPI).
- Poverty threshold: Determined by income levels necessary to meet basic living needs (poverty line).

Therefore, the Gini Coefficient is specifically evaluated to measure Income disparity.