A 2018 study from "Economic and Political Weekly" by US-based anthropologist Balmurli Natrajan and India-based economist Suraj Jacob suggests that the percentage of vegetarians is about 20%, In which, Hindus are major meat-eaters who are 80% of the Indian population, where only a third of the upper-caste Indians are vegetarian. The vegetarian households have higher income, consumption and more affluent than meat-eating households, the upper-caste eat meat less frequently as they become richer and the lower castes, dalits and tribes-people are mainly meat eaters according to National Family Health Survey (NFHS). The study argues that meat-eating behavior is underreported because consumption of meat, especially beef, is "caught in cultural, political, and group identity struggles in India". Vegetarianism is less common amongst non-Hindu Indian religious groups such as Muslims, Christians. Vegetarianism is most common amongst Sikhs and Jains in India. Increases in meat consumption in India have been attributed to urbanisation, increasing disposable income, consumerism and cross-cultural influences.