National Income

Step 1: Meaning of National Income.
National Income is the total monetary value of all goods and services produced within a country's borders over a specific period of time, usually measured annually. It is an indicator of a country's economic health and is used to compare the economic performance of different nations.

Step 2: Features of National Income.
1. **Inclusive of All Economic Activities**: National income includes all goods and services produced, both market and non-market.
2. **Measurement of Economic Performance**: It serves as a measure of a country's economic performance and standard of living.
3. **Income Distribution**: National income also reflects how income is distributed among the various sectors of the economy, such as labor, capital, and entrepreneurship.
4. **Excludes Non-Market Activities**: Non-market activities, such as household labor and volunteer work, are not counted in national income.

Final Answer:

Step 1: Identify the concept.
This refers to **National Income Accounting**. National income data collection helps in measuring the total economic output of a country.

Step 2: Purpose.
The primary purpose of collecting National Income data is to assess the overall economic health, plan policies, and understand the income distribution in the country.

Step 3: Conclude.
Therefore, Rani is collecting data for the study of India's National Income to understand economic indicators like GDP, GNP, etc.

Final Answer: