اثرات بالقوه تغییرات قیمت برق بر تشکیل قیمت ها در اقتصاد: تجزیه و تحلیل مدل ماتریس حسابداری اجتماعی قیمت برای ترکیه
|کد مقاله||سال انتشار||مقاله انگلیسی||ترجمه فارسی||تعداد کلمات|
|10042||2011||11 صفحه PDF||سفارش دهید||9200 کلمه|
Publisher : Elsevier - Science Direct (الزویر - ساینس دایرکت)
Journal : Energy Policy, 39 (2011) 854-864
Recent reforms in the Turkish electricity sector since 2001 aim to introduce a tariff system that reﬂects costs. This is expected to affect the production and consumer prices of electricity. The changes in electricity prices are then reﬂected in production costs in other segments of the economy . Subsequently, producer and consumer prices will be affected. The potential impact of the changes in electricity prices that the ongoing electricity reforms in Turkey will bring about may have important implications on the price formation in economic activities and the cost of living for households. This paper evaluates the potential impacts of changes in electricity price s from a social accounting matrix (SAM ) price modeling perspective. It is found that based on the estimated price multipliers that prices in the energy -producing sectors, mining, and iron and steel manufacturing sectors would be affected more severely than the remaining sectors of the economy. Consumer prices are affected slightly less than producer prices.
Regulatory reforms in electricity markets have been under way in many countries since the 1980s with an aim to introduce a liberal electricity market. In most cases, state monopolies were deregulated. Following this trend, to create a more competitive market in its electricity industry, which was dominated by a vertically integrated state monopoly, successive governments in Turkey have undertaken various structural reforms after 1984. These reforms were mostly related to ownership and production structure in the electricity industry. As a result of political factors that stood as an obstacle to full liberalization, the regulatory agency, Energy Market Regulatory Authority (EMRA), could be established only in 2001. Turkey is an emerging economy with an increase in demand for electricity. According to a Turkish Electricity Transmission Company report, electricity demand has increased on average by 6.5% per annum between 2002 and 2008, and ofﬁcial projections estimate the growth of electricity demand for the period 2010–2 018 between 6.6% and 7 .5% (T EIAS ( Turkish Electricity Transmission Company) , 2009 : 4–1 3). Based on estimated electricity demand in 2008 at 3 57.2 billion kWh and the projected capacity increases, electricity demand in 2017 may exceed the supply (TEIAS ( Turkish Electricity Transmission Company), 2009: 41). Such expectations and projections for the near future raise a number of questions for the liberalization efforts in the Turkish electricity industry. First, the need for additional investments calls for attention to funding of such large scale investments . Second, alternative sources of power generation, including the recent plans to build a nuclear power plant and enhancing the use of renewable sources, as demonstrated by recent attempts towards these directions, become an important issue for the policymakers. Finally, efﬁcient running of the dereg ulation in the electricity market becomes crucially important for ensuring the continuity of electricity supply under such circumstances. As a response to the stated problems, the government has been pushing for a restructuring in the electricity market, more intensely in particular after the start of the regulatory reforms in 2001. An important aspect of these reforms is the introduction of a tariff system that reﬂects costs. This is expected to affect the industrial and residential users of electricity through induced changes in prices. Currently, electricity tariffs are prepared by the producers and EMRA, and ﬁnally approved by EMRA. The approved tariffs are binding for all producers. For EMRA, consumer protection is highly important for determining tariffs. As an important input for numerous productive activities, changes in electricity prices undoubtedly have an impact on production and in vestment decisions of ﬁrms and on the aggregate price level and hence inﬂation. The regulatory reforms and the restructuring efforts in the electricity sector will unquestionably have an impact on the prices in other sectors of the economy as well as on households. Previous studies have investigated the impact of such reforms in the electricity markets of some countries on the economy using input–output analysis, social accounting matrix analysis, and general equilibrium analysis. In an earlier study, Han et al. (2004) examined the impact of the rises in electricity prices in the Korean economy and found signiﬁcant increases in the overall price level in the economy due to high electricity dependence of the industries. Nguyen (2008) examined the impact of increasing the electricity prices as envisaged by the government as part of the restruc turing in the power sector in Vietnam and found no signiﬁcant impact on the aggregate price level. Zhao and You (2008) examined the impact of electricity price reforms on the Chinese economy and found that if the electricity prices were increased by 10%, this price shock would affect the agriculture and manufacturing sectors the most. Finally , Seymore et al. ( 2 009) examined the impact of electricity generation tax on the South African economy and found negative impact on demand and employment, but when combined with beneﬁts from pollution abatement, the net effect on the economy turns out positive. The potential impact of electricity reform on sectoral producer and consumer prices in Turkey is an unexplored area although electricity market reforms in Turkey have been subject to a number of studies. In particular, the extent of in efﬁciency and the impact of the reforms on efﬁciency are of utmost importance. Akkemik (2009) found for the electricity generation sector in Turkey that efﬁciency and technological progress has improved after the regulatory reforms in 2001. Bagdadioglu et al. (2007) found potential production efﬁciency gains (reduction in input usage by 16%) as a result of mergers among existing ﬁrms in the electricity distribution sector during the period 1999–2003 ( Bagdadioglu et al., 2007 ). These studies imply potential beneﬁts for ﬁrms and the sector as a whole from the recent reforms, such as cost reduction and the positive effect on ﬁrms’ motives of production and proﬁts through change of ownership. In addition, Bagdadioglu et al. (2007) examined the potential impact of electricity reform on different types of households in Turkey, using simulation analyses and data from 2003 Turkish Household Expenditure Survey. Price change scenarios address the mismatch between actual tariffs and long-run marginal costs that may arise from ﬁve different cases: (i) reﬂection of regional network losses, (ii) merger of distribution companies, (iii) a rise in the currently low residential to industrial tariff ratio, (iv) reduction of high taxes on households, and (v) a change in the current ﬂat rate price system to a tariff system, which reﬂects consumption-related costs. They found that changing the tariffs and tariff structures have different effects on different household types. Their results point to adverse effects on low income households. The recent regulatory reforms in the Turkish electricity market aims at restructuring the electricity market towards a competitive market. In this regard, privatization and investments to enhance the generation capacity and ensure supply security to meet the forecasted increases in demand are regulated and interim cost- based tariff rates are set by the regulatory agency. According to the regulatory agency, tariff arrangements aim to balance the interests of consumers and suppliers, to encourage competition, encourage economic efﬁciency, and to ensure the ﬁnancial viability of the electricity market ( EMRA (Energy Market Regulatory Authority), 2003: 52). Since electricity is an important input for production and occupies a certain share of household expenditures, changes in the price of electricity stemming from such reforms have an impact on the economy. On another account, inﬂation has been an important source of macroeconomic instability for a long time in Turkey and the central bank is implementing an inﬂation targeting policy. Therefore, a change in aggregate price level due to price increases in important inputs such as electricity bear important policy implica- tions. To address these issues, this paper evaluates the impact of the reforms on price formation for the production sectors and house- holds from a social accounting matrix (SAM) price modeling perspective. In this approach, intersectoral relations are taken into account and the impact of a change in the cost of electricity generation on the price levels in the remaining production sectors of the economy are examined in a disaggregated manner. The SAM price modeling approach allows for an examination of the impacts of the changes in electricity prices on both the producer and consumer prices. In addition, the impact on aggregate households account, i.e., the impact on cost of living, is also investigated. SAM price models, after they were introduced by Roland-Holst and Sancho (1995), have been recently used in policy evaluation (e.g., Parra and Wodon, 2008). The novelty of this paper is that it is the ﬁrst attempt to quantify how the changes in the electricity prices in Turkey impact on prices in other sectors. I believe that this study is particularly important at a time when there is a heated debate on the electricity demand–supply mismatch and a possible energy crisis due to this problem. The remainder of the paper is organized as follows. Section 2 overviews the recent reforms in the Turkish electricity sector. The methodology of modeling prices in a SAM framework is explained in Section 3. Section 4 outlines the basic structure and the con- struction of the SAM. Policy experiments are done in Section 5. Finally, Section 6 concludes with policy recommendations.