# A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Poll Tax
A lump-sum tax levied on every citizen at the same rate regardless of income or wealth, inherently regressive in nature.
Polluter Pays Principle
The principle that requires the polluting party to bear the costs associated with mitigating pollution, in line with the damage caused to society or the level of pollution exceeding acceptable standards.
Pollution
Damage to the environment by the emission of noxious substances, impacting air, water, and land surfaces.
Pollution Control
Methods and policies to reduce pollution including taxation, quantitative restrictions, and alternative technologies.
Pollution Rights
A government-issued permit that entitles a firm to emit a specified quantity of pollution.
Pollution Standards
An examination of pollution standards—regulated limits on pollutants as imposed by governments.
Ponzi scheme - Definition and Meaning
An extensive analysis of Ponzi schemes, including historical context, definitions, major analytical frameworks, and case studies.
Pooled Least Squares
Least squares regression analysis that ignores possible group structure of the data
Pooling Equilibrium
An equilibrium where agents with differing characteristics choose the same action, common in markets such as insurance.
Portfolio
A collection of different assets owned by an individual or a firm, designed for risk reduction and optimizing liquidity.
Portfolio Selection
The choice of proportions in different assets to maximize expected benefit from a given stock of wealth.