“…But due to the changes in environmental conditions, understanding the effects of tourism development indices on the EF is challenging. In this sense, the EF is a multidimensional and comprehensive concept that can be measured not only by using economic variables (such as income, investment, gross domestic product, import, and export) (Koçak et al, 2020; Nguyen et al, 2020; Wang et al, 2020) but also by using energy and energy consumption measures (oil and natural gas, coal) (Awodumi & Adewuyi, 2020; Bildirici & Bakirtas, 2014; Saboori & Sulaiman, 2013), infrastructure variables such as hotels, restaurants, road transportation (Vatan & Bildin, 2020) and tourists' expectations and demand of tourists can be measured.…”