Understanding the Law of Consumption and Household Budgets

The question asks about the economist or statistician who developed the "Law of Consumption" specifically concerning household budgets. This law describes patterns of consumer spending as income changes. It's a fundamental concept in the study of economics and household expenditure.

Identifying the Developer of Engel's Law

The "Law of Consumption" related to budget patterns, as described in the question, is famously known as Engel's Law. This law was formulated by the German statistician Dr. Ernst Engel.

Engel's Law observes how the proportion of income spent on different categories of goods and services changes as income rises. His most significant finding, often referred to as Engel's First Law, focuses on food expenditure.

Key Aspects of Engel's Law (Law of Consumption)

According to Engel's Law, as a household's income increases:

• The percentage of income spent on food decreases, even though the absolute amount spent on food might increase.
• The percentage of income spent on housing and clothing tends to remain relatively constant.
• The percentage of income spent on other categories, such as education, healthcare, recreation, and luxury goods, tends to increase.

This law provides valuable insights into household budget allocation and consumer behavior across different income levels. It's a key concept when analysing expenditure patterns and the impact of economic growth on different sectors.

Based on historical economic studies and the description of the "Law of Consumption" for budget analysis, Dr. Engel is the correct figure associated with this concept.

Let's briefly look at the other options:

• Adam Smith: A pioneering economist known for "The Wealth of Nations" and the concept of the invisible hand, but not specifically the Law of Consumption or Engel's Law.
• M. Marshall: Likely referring to Alfred Marshall, a highly influential economist who developed marginal utility theory and is known for "Principles of Economics," but Engel's Law is attributed to Ernst Engel.
• Gross and Crandle: These names are not typically associated with the development of major economic laws like the Law of Consumption or Engel's Law in standard economic literature.

Therefore, the developer of the "Law of Consumption" for budget, also known as Engel's Law, is Dr. Engel.