Real Rates of Return in Electricity Supply: New South Wales,Tasmania and Victoria*

This paper uses a newly developed economic return model to estimate the real (inflation adjusted) costs of supply, and rates of return, for the electricity systems in three States over very long time periods. It is shown that because of a combination of public ownership and the use of historical cost accounts, the real return on capital tends to fall with the onset of rapid inflation such as occurred in the mid 1970s In NSW in particular the rapid growth in demand for electricity in the 1970s due to falling real electricity prices and considerable increases in other energy prices has given rise to a major investment program and rapidly developing excess capacity. Higher real electricity prices in the 1980s, combined with the economic slump of 1982, resulted in low or negative growth rates in demand Much of the boom I bust mentality evident in all three States may have been avoided or ameliorated had the electrical supply authorities been required to earn even a very modest real rate of return of (say) 4 or more per cent p.a. which is considerably below the (pre-tax) return earned in the corporate sector.     

Estimating the Costs of Protecting Native Species from Invasive Animal Pests in New South Wales,Australia

Invasive animal pests reduce crop and livestock output, require management and control measures, and threaten native plants, animals and their habitat. The agricultural and management costs are often directly measurable. But the costs to protect threatened native plants and animals are harder to assess. The Rural Lands Protection Boards were the government agency in New South Wales that managed invasive animals. An analysis of their decisions provided the opportunity to estimate the costs of protecting native species. The number of native plants and animals threatened by invasive pests was modelled against the expenditure, area, pest abundance, climate and location of 38 Board districts. There was a strong negative relationship between the number of threatened native species and Board expenditure. This relationship was interpreted to estimate the marginal cost of protecting a threatened native species, the downward shift in the supply curve necessary to protect all threatened native species, and the gains from the shift in the form of cost savings in the continued protection of non-threatened native species. These results value some of the costs that invasive animal pests impose on the environment.     

An Analysis of Income Distribution between the North and the South: the Grossman–Helpman and Lai Results Re‐examined*

This paper studies the effects of labor supply on relative wages in a dynamic North–South model of trade. Lai (1995 )—a generalization of the Grossman and Helpman (1991a,b , ch. 11) models—showed that the relative wage of skilled (unskilled) labor in a region is positively (negatively) related to the supply of skilled (unskilled) labor in that region. These surprising results depend crucially on the specification of the functional form of the Southern imitation activity. We will show that these results (except for the relative wage of unskilled labor in Lai) are reversed in the case where the productivity of imitation depends only on the number of products the North manufactures.     

An Economic Analysis of the Eutrophication Problem of the Barwon and Darling Rivers in New South Wales

The focus of the paper is the 1000 km toxic blue-green algal bloom which afflicted the Barwon and Darling Rivers in 1991. Factors which contributed to the bloom are increased water use for irrigation, drought and nutrient pollution, mainly phosphorus from sewage treatment plants and other point sources. A model for finding the optimal allocation of nutrient removal amongst point sources is developed in which the blue-green algal externality impacts on a number of locations on the rivers. The cost of pollution function is unknown but our results suggest that if the marginal costs of phosphorus removal are low, the equilibrium level of phosphorus at each location is likely to be below that which reduces the recreational value of the rivers.     

Using a Real‐Options Approach to Model Technology Adoption Under Carbon Price Uncertainty: An Application to the Australian Electricity Generation Sector*

The present climate for investment in electricity generation assets in Australia is uncertain. We develop a real‐options model to contrast the timing of the uptake of various electricity generation technologies under two carbon tax simulations: when a carbon tax of known size commences at a certain date in the future; and a carbon tax of known size commences at an uncertain date in the future. We find that uptake in the future varies significantly depending upon an investor's view of uncertainty and whether the technology is primarily designed to be viable in a market with or without carbon taxes.     

规模经济、规模报酬与农业适度规模经营——基于我国粮食生产的实证研究

有关规模经营的问题一直是学术界和政府部门关注的热点问题之一。本文基于一个随机抽样的来自我国粮食主产区5省100个村庄1049个农户的实地调查数据,分别从投入产出和生产成本两个不同的角度全面考察了我国主要粮食作物品种生产规模经济的存在性。实证研究表明,在考虑土地细碎化的影响后,我国粮食生产总体上而言规模报酬不变。由此可见,如果政府单纯出于提高粮食产量的目的而大规模推行规模经营的政策显然是不可取的。同时发现,除粳稻外,扩大土地经营规模对单位产量生产总成本均有显著的负面影响。而在其他条件不变的情况下,成本降低与经济效益提高实质上是一致的。因此,农业经营规模的扩大有利于促进农民增收。     

Wealth Concentration over the Path of Development: Sweden, 1873–2006*

We study wealth concentration in Sweden over 130 years, from the beginning of industrialization until the present day. Our series are based on new evidence from estate and wealth tax data, foreign and domestic family firm‐wealth, and pension wealth estimates. We find that Swedish wealth concentration was high in the agrarian state, and changed little during early industrialization. From World War I until about 1950, the richest percentile lost ground to high‐income earners in the rest of the top‐wealth decile. This equalization continued postwar; the entire top decile lost‐out relative to the rest of the population. Around 1980, wealth compression stopped and inequality increased. We approximate the effects of international flows and find that the recent increase in wealth inequality is probably larger than what official estimates suggest.     

The effect of economic freedom on growth revisited: New evidence on causality from a panel of countries 1970–1999

Does economic freedom cause economic growth or does causality run in the reverse direction? And do all the constituent parts of economic freedom exert a causal impact on economic growth or do some freedoms matter more than others? In order to answer these questions, this paper conducts a series of Granger causality tests using panel data for the period 1970–1999. In addition, the paper discusses a number of model specification issues, e.g. lag-length selection and the importance of intervening variables. The results suggest that some (but not all) aspects economic freedom affect economic growth and investment. On the other hand, there is only weak evidence that growth affects economic freedom.     

Incentive to Work versus Disincentive to Invest: The Case of China's Rural Reform, 1979–1984

An institutional change from the communal system to the household responsibility system in rural China brought about an increase in productivity during 1979–1984, but it has also opened up a set of new problems, including decreased investment. I argue that the new responsibility system is effective in providing work incentives to peasants by rendering residual claims, but not so in internalizing positive externalities of investment, resulting in underinvestment. Remedies such as agricultural investment subsidies, investment tax credits, the roles of such institutions as township and village enterprises in undertaking investment in agricultural infrastructure, and most fundamentally, well-defined property rights are discussed.     

The Entry Cost Shock and the Re‐rating of Power Prices in New South Wales,Australia

Australia has long been the beneficiary of low, stable power prices. A decade‐long state of oversupply underpinned this result and while plant capital costs had been rising, the cost of capital had been declining. These offsetting effects locked the wholesale market into an average cost of $35–$40/MWh. However, from 2007, a simultaneous and sharp rise in new entrant plant capital costs and the cost of capital occurred. The combined effects crept up on the industry while it was in a state of oversupply. This ‘entry cost shock’ disrupted a 7 year long equilibrium price, with average power system cost rising to $60/MWh.     

Interest Parity,Monetary Policy and the Volatility of Australian Short-Term Interest Rates: 1978–1982*

The period since the introduction of the Treasury note tender in December 1979 has been characterized by increased variability of Australian short-term interest rates. Using a methodology suggested by Evans, the increase in variability of the 90-day commercial bill rate is decomposed into that attributable to domestic monetary policy, seasonal influences, covered international interest rate movements and other miscellaneous influences. The results suggest that after December 1979 Australian short-term interest rates became more sensitive to surprises in the domestic monetary base, covered Eurodollar rate surprises and seasonal influences. Increased volatility of the covered Eurodollar rate also contributed to increased variance of domestic rates.     

Industry Inefficiency,Monopoly and Import Liberalization in New Zealand — An Assessment of the Static Welfare Effects*

A monopoly industry trade model embodying various assumptions is used to estimate the static, partial, welfare effects of the New Zealand import liberalization policy introduced in 1984. Import licences for products competitive with domestic manufactures are being expanded, causing tendered premiums to fall until tariffs assume the protective role. The resulting price falls are estimated to produce an aggregate welfare gain of 0.28 per cent of GDP, and to generate large distributional effects.     

Indices of the Average Age of Structures and Equipment in Australia 1955/56–1982/83*

This paper presents an expression for the average age of the capital stock in terms of the rate of depreciation and the rate of accumulation. We derive indices for the average age of private sector structures (excluding dwellings) and equipment in Australia.     

Economic Growth and Convergence Across the Seven Colonies of Australasia: 1861–1991*

Have the poor economies of Australasia grown faster than the rich ones? This question is analyzed for the seven colonies of Australasia for the period 1861–1991, and it is found that the levels of per-capita income across the colonies are converging to one another: the initially poor colonies have indeed grown faster. The cross-sectional dispersion of per-capita incomes also declined between 1861–1991, but most of this decline occurred in the pre-Federation 1861–1901 period, as the extent of dispersion in 1991 is very close to that attained in 1901.     

Real Wages,Demand and Employment in the UK 1921–1938: A Disaggregated Analysis

This paper uses the Layard and Nickell model of the labour market to examine the determinants of employment at a sectoral level for the interwar UK economy. Sectoral level data permits examination of the differing responses to changes in the determinants of employment. Estimation of employment functions indicates significant elasticities with respect to aggregate demand variables across a wide range of sectors but less support for a negative real wage effect, particularly in those industries responsible for major losses in employment. The evidence is therefore more consistent with the low-aggregate-demand explanation of labour market behaviour than it is with the high-real-wage hypothesis.     

Measurement of Dematerialization/Materialization: A Case Analysis of Energy Saving and Decarbonization in OECD Countries, 1960–95

This article establishes a conceptual framework for dematerialization and materialization, and develops a complete decomposition model for measuring them. Based on our conceptual framework and method, dematerialization in the energy use of the OECD from 1960 to 1995 has been analyzed. During this period, the increase in energy demand was 3597.95 Mtoe. However, the improvement of energy efficiency decreased energy demand by 827.20 Mtoe, and structural shifts decreased energy demand by 139.04 Mtoe. Thus, real energy demand only increased by 2631.71 Mtoe, and the energy saved was 966.24 Mtoe and the energy saving rate was 17.98% for this period. The energy saving rate was about 0.56% per year. In the same period, the increase of CO₂ emissions was 9672.95 Mton. The fuel switching, the improvement of energy efficiency, and structural shifts decreased CO₂ emissions by 1899.67, 2150.31, and 379.07 Mton, respectively. Real CO₂ emissions only increased by 5243.93 Mton, the decarbon was 4429.02 Mton and the decarbonization rate for the period was 29.57%. The decarbon rate was about 0.997% per year. These results show that significant dematerialization has been achieved in the OECD during this period.     

North–South Outsourcing,Immigration, and Skilled Wages: Through the Lens of Incomplete Contracts

The forces of immigration and offshore outsourcing are subject to factors that leave sufficient room for incompleteness in a contract. The authors present a model that allows one to compare the effects of immigration and offshore outsourcing, on skilled wage, when both are subject to contractual incompleteness. They capture the sensitivity of the effect on the skilled wage, of immigration and offshore outsourcing to complementarities between firm‐specific human capital and human capital that is transferable across firms manufacturing intermediate goods. In particular, the authors show that the North–South gap in skilled wages is likely to (i) increase through the forces of immigration when the intermediate goods' technology is super‐modular in the North but sub‐modular in the South and (ii) decrease through the forces of outsourcing when the intermediate goods' technology is sub‐modular in the North but super‐modular in the South.