Irán
Tourism plays an important role in the economy of the societies and recognition of various size of its demand, makes a significant contribution to decisions of economic development. The aim of current research is to investigate the impacts of household size of tourists on the demand for domestic tourism in Mashhad city. The information used in this research is the type of cross-sectional which includes 1388 domestic tourist families who have stayed in Mashhad city for at least one night in 2015. The sample study of this research is selected as a randomized stratified sampling and required information is collected by oral interview with the head of the household of tourists and questionnaires completion. By using the AIDS model, the income and price elasticities for 6 products including: food, accommodation, transportation, having fun, shopping and souvenirs are calculated and The impacts of household size on travels are studied on the demand for tourism products in Mashhad city.