This reflects the variation present within the data sources used for a particular country or territory.what Validity. A study published in 2002 found a "very strong significant correlation" between the Corruption Perceptions Index and two other proxies for corruption: ...

The economy of the People's Republic of China is a developing mixed socialist market economy, incorporating industrial policies and strategic five-year plans. [29] China is the world's second largest economy by nominal GDP and since 2016 has been the world's largest economy when measured by purchasing power parity (PPP). [30] [note 2] China accounted for 19% of the global economy in 2022 in ...

A simulation is an imitative representation of a process or system that could exist in the real world. [1] [2] [3] In this broad sense, simulation can often be used interchangeably with model. [2]Sometimes a clear distinction between the two terms is made, in which simulations require the use of models; the model represents the key characteristics or behaviors of the selected system or process ...

In vertebrates, the circulatory system is a system of organs that includes the heart, blood vessels, and blood which is circulated throughout the body. [1] [2] It includes the cardiovascular system, or vascular system, that consists of the heart and blood vessels (from Greek kardia meaning heart, and Latin vascula meaning vessels).The circulatory system has two divisions, a systemic ...