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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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                           AGGREGATE DEMAND AND MARKET DEMAND: The aggregate demand curve, or AD curve, has similarities to, but differences from, the standard market demand curve. Both are negatively sloped. Both relate price and quantity. However, the market demand curve is negatively sloped because of the income and substitution effects and the aggregate demand curve is negatively sloped because of the real-balance, interest-rate, and net-export effects. | Two Similar Curves | 
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To illustrate the specific aggregate demand and market demand curve similarities and differences consider the graph of a negatively sloped curve displayed here. Is this a market demand curve or an aggregate demand curve? A cursory look suggests that it could be either.To reveal the similarities between the both curves, click the [Market Demand] and [Aggregate Demand] buttons. Doing so illustrates that both curves are negatively sloped, with each virtually overlaying the other. Consider the differences between these two curves. - First, note that for the market demand curve, the vertical axis measures demand price and the horizontal axis measures quantity demanded. For aggregate demand curve, however, the vertical axis measures the price level (GDP price deflator) and the horizontal axis measures real production (real GDP).
- Second, the negative slope of the market curve reflects the law of demand and is attributable to the income effect and the substitution effect. In contrast, the negative slope of the aggregate demand curve is based the real-balance effect, interest-rate effect, and net-export effect. Similar, but different.
Most notable, the differences between market demand and aggregate demand mean that it is not possible to merely add up, or aggregate, the market demand curves for the thousands of goods produced in the economy to derive the aggregate demand curve. The aggregate demand curve dances to its own music and plays be its own set of rules.
Recommended Citation:AGGREGATE DEMAND AND MARKET DEMAND, AmosWEB Encyclonomic WEB*pedia, http://www.AmosWEB.com, AmosWEB LLC, 2000-2021. [Accessed: January 16, 2021].
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Today, you are likely to spend a great deal of time at a garage sale looking to buy either a set of steel-belted radial snow tires or a wall poster commemorating the 2000 Presidential election. Be on the lookout for door-to-door salesmen.
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Approximately three-fourths of the U.S. paper currency in circular contains traces of cocaine.
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SDR
Special Drawing Right
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