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October 7, 2026 

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SOCIAL SECURITY: A system for providing financial assistance to the poor, elderly, and disabled. The social security system in the United States was established by the Social Security Act (1935) in response to the devastating problems of the Great Depression. Our current Social Security system has several parts. The first part, Old Age and Survivors Insurance (OASI) is the one the usually comes to mind when the phrase "Social Security" comes up. It provides benefits to anyone who has reached a certain age and who has paid taxes into the program while employed. It also provides benefits to qualified recipients survivors or dependents. The second part of the system is Disability Insurance (DI), which provides benefits to workers and their dependents in the case of physical disabilities that keeps them from working. The third part is Hospital Insurance (HI), more commonly termed medicare. Medicare provides two types of benefits, hospital coverage for anyone in the OASI part of the system and optional supplemental medical benefits that require a monthly insurance premium. The last part of the social security system is Public Assistance (PA), which is the official term for welfare and is covered under it's own heading.

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WORLD BANK: (International Bank for Reconstruction and Development) An agency of the United Nations that was established in 1945 to promote the economic development of the poorer nations in the world. They pursue this goal by providing low-interest loans to less development countries and offering technical assistance on the best ways to use these loans. Funds for the loans are obtained by the World Bank by selling bonds on the world's financial markets. It's long-run economic development orientation is usually coordinated with the shorter-run efforts of its sister U. N. agency, the International Monetary Fund.

     See also | economic development | bond | financial markets | International Monetary Fund |


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INJECTIONS-LEAKAGES MODEL

A macroeconomic model that balances non-consumption expenditures on production (injections) and non-consumption uses of income (leakages) that is used to identify the equilibrium level of, and analyze disruptions to, aggregate production and income. The injections-leakages model is based on the principles of Keynesian economics and provides an alternative to the standard aggregate expenditures (Keynesian cross) analysis. The three injections included in the model are investment expenditures, government purchases, and exports. The three leakages included in the model are saving, taxes, and imports. Three variations are the two-sector injections-leakages model (or saving-investment model), three-sector injections-leakages model, and four-sector injections-leakages model.

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APLS

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Today, you are likely to spend a great deal of time flipping through the yellow pages looking to buy either a set of luggage without wheels or a how-to book on wine tasting. Be on the lookout for letters from the Internal Revenue Service.
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One of the largest markets for gold in the United States is the manufacturing of class rings.
"You don't have to see the top of the staircase to take the first step.¾ "

-- Martin Luther King, civil rights leader

MPS
Marginal Propensity to Save
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