nowadays, agricultural r&d provides new and developed technologies to create modern agricultural producing methods. during recent years, improving agricultural productivity is affected by not only domestic r&d investments but also foreign countries r&d investments. nowadays, according to new growth models, r&d is the base of productivity. recent economic theories consider agricu...

in recent years, economists have paid attention to the relationship between emotions and productivity. economists investigated the bi-directional effect of emotion and subjective well-being, such as happiness, on different economic variables, such as productivity, health, income, and so on. in this paper, we try to study the effect of income on labour force happiness in iran. for this purpose, ...

inflation forecasting has been one of the requirements for the implementation of monetary policy in countries which their monetary authorities are pursuing inflation targeting regime. however, owing to central bank independence in one hand and as well as the lagged effects of monetary policies on inflation in the other, the monetary authorities should have the sound perspective about the future...

â â â â â â â  this paper proposes a new forecasting model for investigating relationship between the price of crude oil, as an important energy source and gdp of the us, as the largest oil consumer, and the uk, as the oil producer. gmdh neural network and mlff neural network approaches, which are both non-linear models, are employed to forecast gdp responses to the oil price changes. the resul...

this paper seeks to understand the role of the cost of pollution from vehicles fuel in feasibility of cng national plan. optimal control theory is used with two target functions, one with and another without the cost of pollution. model results indicate the high importance of pollution cost in the project feasibility, in such a way that without consideration of that the project will be infeasib...

the purpose of this research is investigation of application of the arbitrage pricing theory and effect of unanticipated changes in a set of macroeconomic variables such as inflation rate, money supply, exchange rate, oil price, term structure and industrial production on expected security return in tehran stock exchange. in this research, data are analyzed quarterly for the period of 1997-2008...

In this study, the causal-effect between carbon dioxide emissions and forestry production and trade was investigated in Ghana by employing a data spanning from 1961 to 2014 by using the VECM and ARDL model. Evidence of the long-run equilibrium relationship in the VECM shows that, a 1% increase in veneer sheet production reduces carbon dioxide emissions by 1.47% in the long-run. There was eviden...

there are various views about deceision making for the model of growing crops in risky conditions such as: motad model, inome - variance, grade2 planning, inseparable linear planning, and limited extreme risk model, focus-loss model, and target- motad . in this study, target - motad model has been used as the optimum pattern of growing crops in arsanjan. the results have been compared with thos...

forecasting of macroeconomic variables has specific importance in economic topics. indeed, different models are invented to forecast variables to help economic policy makers in adopting appropriate monetary and fiscal policies. in this paper, the performance of integrated model of input-output (io) and neural network is investigated in forecasting final demand and total production and the resul...