Macroeconomic Activity and Role of Zaka in Achieving Economic Stability (Aggregate Supply and Economic Variable): الزكاة والنشاط الاقتصادي الكلي ودورهما في تحقيق الاستقرار الاقتصادي (العرض الكلي والمتغيرات الاقتصادية)

The duty of Zaka is one of the important financial resources of the Islamic state, it is also an effective tool to eliminate poverty and reduce inequality between society members. As it guarantees a regular flow of funds every year which is spent in specified channels. The obligation of Zaka has a crucial role in economic recovery because of three main factors, which prohibit hoarding, promoting investment, and encourage spending.so that is why the duty of Zaka is accomodate with economics principles. This research aims to clarify and show the economic impact of Zaka fund development through theoretical, mathematical, and graphical analysis on macroeconomics variables which is related to Aggregate Supply. Researcher used theoretical, mathematical, graphical approaches for explanation economic variables. and used deductive approach through shows the effect of zakat on the aggregate supply. researcher concludes that the duty of Zaka is an effective economic tool, and its impact on the economy is cumulative, so it is considered one of the injection elements in the Islamic economy by preventing leakage, through prohibit hoarding, that’s why it has a positive impact on the supply of human and capital resources. The researcher recommends to work on promoting the revival of Zaka, and the Zakat should be compulsory not voluntary through laws and regulations.

Aggregate Supply Response in Algerian Agriculture: The Error Correction Model Applied to Selected Crops

This paper examines aggregate supply response of 19 selected crops in Algerian agriculture during the 1966-2018 period by employing cointegration analysis and error correction model (ECM). It tests whether there has been a long-run equilibrium relationship between agricultural outputs and prices, besides a confirmation about the responsiveness of agricultural supply to economic incentives (prices). Findings indicate that the long-run elasticities of all selected crops with respect to prices are statistically significant and mostly low, whereas short-run elasticities are lower, which appeals to the adequacy of adjustment to economic incentives. Furthermore, the results of the ECM confirmed the positive responsiveness to prices with differential rates of adjustment for selected crops, ruling out the applicability of a presumed perverse supply response in Algerian agriculture.

Accounting for innovative factors of economic growth in the production function of Cobb-Douglas (on the example of old industrial regions of Ukraine)

Based on the analysis of the quantitative assessment of the influence of the factors of innovative activity on the dynamics of economic development and the endogenous determination of its contribution to the economic growth of the country, it is revealed that in foreign researches it is identified with the concept of the influence of scientific and technological progress. However, the impact of innovative factors on economic growth is not considered separately. Attempts of such a definition in Ukrainian researches are limited to well-known approaches: methods of integral assessment, methods of expert assessments, the method of multipliers, econometric models. Most of the approaches considered are focused on defining the innovative impact on economic development, rather than on economic growth. The main tool for assessing the role and innovative contribution to economic growth is the aggregate supply function model, usually based on the Cobb-Douglas production function. The analysis of the approaches used revealed a number of comments on econometric approaches. In contrast to this, an approach is proposed based on the neoclassical production function of Cobb-Douglas with a constant return to scale in the form of J. Tinbergen, with technical progress neutral according to J. Hicks, decreasing marginal productivity of macrofactors with limited interchangeability, which provides a causal functional (and not a statistical) relationship between input and output variables; does not require long time series. It is characterized by dynamic coefficients of elasticity, capital utilization rate and taking into account the innovation factor in each separate period. The innovation factor includes: the gross domestic expenditures on research and development, the expenditures on innovation, general expenditures on education. To define the contribution of formal innovation factor in economic growth applied "method of Solow residual", which by taking the logarithm and obtaining logarithmic derivatives in the production function, provides a formalized information about the contribution of each factor to economic growth and allows to develop the necessary regulatory measures. The method has been tested at the level of the country and old industrial regions of Ukraine: Dnepropetrovsk, Zaporozhye and Kirovograd regions of the Dnieper economic region of Ukraine. The role, importance and influence of the main factors of economic growth along with innovative ones on the part of the aggregate supply are considered and the cost-effectiveness of innovative factors is estimated.

Regional Aspects of Demand and Supply Shocks: Economy of the Khabarovsk Territory During a Pandemic

The article provides an overview of the short-term dynamics of macroeconomic indicators for the Khabarovsk Territory during the COVID-19 pandemic after the introduction of temporary restrictive measures in April and May 2020. The impact of these measures extended both to the elements of regional aggregate demand and aggregate supply. From the point of view of the theory of short-run economic fluctuations, aggregate supply and demand shocks, such as those that occurred in the initial period of the pandemic, lead to a reduction in aggregate output followed by an increase in actual and natural rate of unemployment. Expectations have an additional negative impact since the growth of uncertainty gives rise to an increase in savings and an additional reduction in consumer activity. In the case of Khabarovsk Territory it is shown that the most affected industries of the economy were retail trade and services. Both industries experienced a negative shock in April, but while the former began recovery as early as May, the latter returned to the growth trajectory only in June. Residents changed their income usage patterns due to the restrictions on the consumer market, as well as to increased uncertainty about their future income. The share of net savings and cash balances increased with a corresponding decrease in the share of spending on goods and services. A negative supply shock contributed to a sharp rise in unemployment up to 24.5 thousand unemployed in the third quarter of 2020. Starting from the fourth quarter unemployment began to decline rapidly, but it had not reached pre-pandemic level of less than 7 thousand unemployed by the second quarter of 2021. It is shown that the permanent population outmigration, which increased in 2020, is a specific feature of the regional labor market. It has slowed down the return of the regional aggregate supply to its pre-pandemic positions after the restrictions were cancelled

Economic and Social Impacts of COVID 19 on National Economies from the Point of View of Economic Theory

Research background: The world economy is currently affected by the devastating effects of the global COVID 19 pandemic, reaching the Great Depression of the 1930s. The economic policies of the affected countries are currently focused on short-term measures on the aggregate demand side. To this end, the growth of the public finance deficit is being prepared in the area of fiscal policy, which will ultimately deepen the indebtedness of national economies. If this economic policy is to be sustainable in the long term, measures on the aggregate demand side must be accompanied by measures on the aggregate supply side. Purpose of the article: The purpose of this article is to determine how the current globalization processes affecting the supply and demand sides of selected national economies will be affected in the short and long term as a result of the global COVID 19 pandemic. Methods: A description of the AS - AD model will be performed, covering both short and long periods, and then a description of the impact of globalization processes on aggregate supply and aggregate demand. This will be followed by an analysis of the expected economic and social impacts of COVID 19 on individual globalization processes affecting the supply and demand sides of selected national economies and economic units. Findings & Value added: The article will help to find a systemic approach to the recovery of national economies affected by the effects of the global pandemic COVID 19 through the prism of the AS - AD model.

The Potential Effects of Biden’s Infrastructure Bill on the American Economy

With the world still battling COVID-19 and the attendant effect on the economy, the almost new President Biden’s administration proposed the Build Back Better agenda to get America and Americans working again. This paper is written to address the effect of the proposed infrastructure bill on the American economy. Comparison is drawn between the infrastructure bill and Franklin D. Roosevelt’s new deal before World War II. It is understood that the bill may increase inflation because of the effect of expected inflation, but the bill may also increase aggregate demand and aggregate supply which will be of overall net benefit to the economy.

Chain stability in trading networks

In a general model of trading networks with bilateral contracts, we propose a suitably adapted chain stability concept that plays the same role as pairwise stability in two‐sided settings. We show that chain stability is equivalent to stability if all agents' preferences are jointly fully substitutable and satisfy the Laws of Aggregate Supply and Demand. In the special case of trading networks with transferable utility, an outcome is consistent with competitive equilibrium if and only if it is chain stable.