To generate wealth and support a living standard, all factors of production must be brought together, including land (natural resources), labor (skilled workforce), capital (money and equipment), and entrepreneurship (management of resources and capital). These factors are combined to produce goods and services that are purchased by consumers. A country's gross domestic product, which measures the total value of goods and services produced annually, indicates the overall size and well-being of its economy, with higher GDP signaling a strong economy.