Explanations:The estimation of GDP during the colonial period in India is a significant aspect of economic history. Several economists made notable contributions to this field, and it is important to understand the roles of William Digby, Findlay Shirras, and Dadabhai Naoroji in this context.
William Digby was a British statistician and demographer who made extensive studies on the economic conditions of India during the colonial period. He published several works that included detailed analyses of India's economic output, which were crucial for understanding the economic impact of British rule.
Findlay Shirras was another economist who contributed to the estimation of India's GDP during the colonial period. His work focused on the economic conditions and the impact of British policies on the Indian economy. Shirras provided valuable insights into the economic structure and the changes that occurred during the colonial era.
Dadabhai Naoroji, often referred to as the "Father of Indian Economics," was a prominent figure in the Indian independence movement and a pioneer in the field of Indian economics. He is best known for his work "Poverty and Un-British Rule in India," where he estimated the drain of wealth from India to Britain. Naoroji's work was instrumental in highlighting the economic exploitation of India under British rule and provided a comprehensive analysis of the economic conditions of the time.
Each of these economists made significant contributions to the estimation of GDP during the colonial period. Their work provided a detailed understanding of the economic conditions in India and the impact of British policies on the Indian economy. Therefore, the correct answer is that all three economists—William Digby, Findlay Shirras, and Dadabhai Naoroji—estimated GDP during the colonial period in India.