Economics
For our purposes, the working definition of Economics will be: The exchanging of socially valued items, both concrete and conceptual. This includes but is not limited to; currency, tangible items, services, food, water, housing, ideas, healthcare, real property, stocks, leases, promises of future services, favors, etc.
Next a list of things that might motivate an individual to participate in this exchange:
Basic survival need, perceived social need, pursuit of financial reward, fear of punishment, pursuit of individual reward.