The impact of Kazakhstan accession to the World Trade Organization : a quantitative assessment

In this paper the authors use a computable general equilibrium model of the Kazakhstan economy to assess the impact of accession to the World Trade Organization (WTO), which encompasses (1) improved market access; (2) Kazakhstan tariff reduction; (3) reduction of barriers against entry by multinational service providers; and (4) reform of local content and value-added tax policies confronting multinational firms in the oil sector. They assume that foreign direct investment in business services is necessary for multinationals to compete well with Kazakstan business services providers, but cross-border service provision is also present. The model incorporates productivity effects in both goods and services markets endogenously, through a Dixit-Stiglitz framework. The authors estimated the ad valorem equivalent of barriers to foreign direct investment based on detailed questionnaires completed by specialized research institutes in Kazakhstan. They estimate that Kazakhstan will gain about 6.7 percent of the value of Kazakhstan consumption in the medium run from WTO accession and up to 17.5 percent in the long run. They estimate that the largest gains to Kazakhstan will derive from liberalization of barriers against multinational service providers, but the other three elements of WTO accession that the authors model all contribute positively to the estimated gains. Piecemeal sensitivity analysis shows that qualitatively the results are robust, but there are four parameters in the model that significantly affect the estimated magnitude of the gains from WTO accession.Economic Theory&Research,Transport Economics Policy&Planning,Free Trade,ICT Policy and Strategies,Investment and Investment Climate

Trade, foreign exchange, and energy policies in the Islamic Republic of Iran : reform agenda, economic implications, and impact on the poor

The Islamic Republic of Iran has committed itself to substantial trade and market reform in its Third Five-Year Development Plan. It started out with nontariff barriers on all products, a dual exchange rate regime with the market rate more than four times the official rate, and domestic energy subsidies equal to about 90 percent of the cost of energy products. Many of these policies were justified as helping the poor. To analyze the effect of the reforms, separately and together, the authors develop a multisector computable general equilibrium model with 10 rural and 10 urban households. They find that the combined reforms could generate welfare gains equal to about 50 percent of aggregate consumer income. These gains reflect the large initial distortions-for example, energy subsidies equal to about 18 percent of GDP, and retail energy prices equal to about 10 percent of world market prices. Separately, trade reform would lead to gains of about 5 percent of income, exchange rate reform to gains of 7 percent of income, and energy pricing reform to gains of 33 percent of income. The authors'results show that well-intentioned commodity subsidy policies for the poor can have perverse effects. Direct income payments to all households (not just the poor) would vastly increase the incomes of the poor compared with the status quo. Moreover, if the combined reforms were implemented, the poorest rural household would receive gains equal to about 290 percent of its income, and the poorest urban household gains equal to about 140 percent of its income.Environmental Economics&Policies,Health Economics&Finance,Banks&Banking Reform,Economic Theory&Research,Payment Systems&Infrastructure,Economic Theory&Research,Environmental Economics&Policies,TF054105-DONOR FUNDED OPERATION ADMINISTRATION FEE INCOME AND EXPENSE ACCOUNT,Health Economics&Finance,Economic Stabilization

Reasoning about Independence in Probabilistic Models of Relational Data

We extend the theory of d-separation to cases in which data instances are not independent and identically distributed. We show that applying the rules of d-separation directly to the structure of probabilistic models of relational data inaccurately infers conditional independence. We introduce relational d-separation, a theory for deriving conditional independence facts from relational models. We provide a new representation, the abstract ground graph, that enables a sound, complete, and computationally efficient method for answering d-separation queries about relational models, and we present empirical results that demonstrate effectiveness.Comment: 61 pages, substantial revisions to formalisms, theory, and related wor