نتایج جستجو برای: income source
تعداد نتایج: 518126 فیلتر نتایج به سال:
By supplementing income explicitly through payments or implicitly through taxes collected, income-based taxes and transfers make disposable income less variable. Because disposable income determines consumption, policies that smooth disposable income also create welfare improving consumption insurance. With data from the Panel Study of Income Dynamics we find that annual consumption variation i...
population in all countries plays a fundamental role in economic growth and economic development. but besides absolute size and growth rate of population, the more important factor will be “age structure” or “age distribution” of population, because it can be as source of many economical, social, and political challenges. in this research, we investigate effect of changes in population shares i...
در چند سال اخیر نیاز به استفاده از منابع انرژی تجدیدپذیر نظیر انرژی خورشیدی، پیل های سوختی و انرژی بادی افزایش یافته است. از این میان پیل های سوختی به دلیل عدم آلودگی، بازدهی بالا و مستقل بودن از شرایط آب و هوایی، منابع انرژی بسیار مفیدی هستند. روش مرسوم برای کنترل این پیل ها استفاده از یک مبدلdc/dc می باشد.در کاربردهای سه فاز مانند درایو موتورهای ac، یک اینورتر هم باید در مسیر مبدل dc/dc قرار ...
one of the main principles of resistance economy, is to support domestic production and limiting imports, especially in sectors where there is the possibility of import-substituting production .this requires adjustment of exact trade policies,and to achieve this, identifying the structure of imports demand function and also price and income elasticity of import demand is necessary.this necessit...
Financial adequacy in retirement largely depends on Social Security, pensions, and savings—commonly referred to as the “threelegged stool” of retirement income. Correspondingly, the elderly who receive all of their income from Social Security benefits are recognized as being economically vulnerable. Income of the Population 55 or Older, 2004, produced by the Social Security Administration (SSA ...
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