undertaking(The term undertaking is not defined in the EC Treaty or the Act, but its meaning has been set out in Community law. It covers any natural or legal person engaged in economic activity, regardless of its legal status and the way in which it is financed. It includes companies, partnerships, firms, businesses, individuals operating as sole traders, agricultural cooperatives, associations of undertakings (e.g. trade associations), non-profit making organisations and (in some circumstances) public entities that offer goods or services on a given market. 'More)
economic agent(In economics, an agent is an actor and decision maker in a model. Typically, every agent makes decisions by solving a well or ill defined optimization/choice problem. The term agent can also be seen as equivalent to player in game theory. For example, buyers and sellers are two common types of agents in partial equilibrium models of a single market. Macroeconomic models, especially dynamic stochastic general equilibrium models that are explicitly based on microfoundations, often distinguish households, firms, and governments or central banks as the main types of agents in the economy. Each of these agents may play multiple roles in the economy; households, for example, might act as consumers, as workers, and as voters in the model. Some macroeconomic models distinguish even more types of agents, such as workers and shoppers[1] or commercial banks. wiki – АД); market participant; transactor; commercial entity(raf)
