EC or ec may refer to:
Economics (UK English: /iːkəˈnɒmɪks/, /ɛkəˈnɒmɪks/; US English: /ɛkəˈnɑːmɪks/, /ikəˈnɑːmɪks/) is "a social science concerned chiefly with description and analysis of the production, distribution, and consumption of goods and services" according to the Merriam-Webster Dictionary.
Ecuador (/ˈɛkwədɔːr/ EK-wə-dor, Spanish: [ekwaˈðor]) (Quechua: Ikwadur), officially the Republic of Ecuador (Spanish: República del Ecuador, which literally translates as "Republic of the Equator"; Quechua: Ikwadur Ripuwlika), is a representative democratic republic in northwestern South America, bordered by Colombia on the north, Peru on the east and south, and the Pacific Ocean to the west.
The United States is the world's largest national economy in nominal terms and second largest according to purchasing power parity (PPP), representing 22% of nominal global GDP and 17% of gross world product (GWP).
China's socialist market economy is the world's second largest economy by nominal GDP, and the world's largest economy by purchasing power parity according to the IMF, although China's National Bureau of Statistics rejects this claim.
The economy of India is the seventh-largest in the world measured by nominal GDP and the third-largest by purchasing power parity (PPP).
Russia has an upper-middle income mixed economy with state ownership in strategic areas of the economy.
Ecology (from Greek: οἶκος, "house", or "environment"; -λογία, "study of") is the scientific analysis and study of interactions among organisms and their environment.
Economic inequality is the difference found in various measures of economic well-being among individuals in a group, among groups in a population, or among countries.
North Korea's economy is a centrally planned system, where the role of market allocation schemes is limited, though increasing.