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Over the past decades, one of the most important indicators of the development and welfare was economic growth or any quantitative variables such as gross domestic product and income per capita. As long as the World has experienced a wide gap among rich and poor countries, economic growth as the only effective factor in welfare was questioned and consequently, gross domestic product distribution and other issues related to social justice raised as a distinguished feature of welfare and development economics. Estimating welfare trend in Iran can mirror the policies imposed by policymakers. Therefore, this paper aims to estimate welfare index during 1974- 2006 period. In this paper MATLAB software is used to estimate welfare employing fuzzy logic model using Sen's approach. The results of this study show that in spite of high degrees of vacillation, welfare trend was ascending during the aforementioned years. The maximum value obtained was 0.715 in 2005 while the minimum value obtained was 0.421 in 1994.

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In macroeconomics literature inspired by traditional economists, it is said that economic growth and more equal distribution in income, are two opposite targets since moving toward more equality of income, will reduce propensity to saving. Based on the optimum growths models, it seems that the highest levels of growth can happen in a system just when in allocating the resources among the generations the attention is more paid to the concept of justice. If in this process the attention is more paid to the present generation compared to the future ones, the available resources for the whole system will decrease and as a result the economic growth will be stabilized at far lower rates. The more economic justice means the higher rate for economic growth. In this paper we use an optimal growth theory for studying the mechanics of this regularity. Empirical calibration of the model to the Iranian economy reveals that if economic policy makers in a planning period via a scenario can decrease social time preference to a 5%, real per capita GDP, consumption, saving and per capita capital formation will increase by 6.5%, 2.2% and 42% respectively.

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In recent decades, the new technologies have been thoroughly discussed to have great impacts on growth in economics literature. This study is aiming at investigating the impact of ICT and social welfare on economic growth. For this purpose, cross-provincial estimation was used by panel data from 2002 to 2006. The variables which are used in this research are per capita GDP, age indicator ICT investment, human capital and pe capita physical investment. The results show that social welfare and ICT have a positive and significant impact on economic growth in all provinces of the country.