Economies of scale in school operation–a reply

In addition to pointing out that Kumar (1983) omits Hough (1981) and Knight (1983) from its list of reference, Hough (1983) raises two issues of largely statistical nature. ^{1 1} Omissions are clearly inadvertant. The time lag between publication and the general availability makes ther reference list look more subjective than it actually is. These are:

1. the use of an average (AC) rather than a total (TC) cost curve as the correct statistical device for examining economies of scale, and

2. estimation problems arising from possible heteroscedasticity of the error term in the estimating relation.

Exactly the same issues are also raised in Hough (1981). Notwithstanding our earlier disclaimer (p. 324) that ‘no new grounds are broken on the methodological front’ as well as a clear mention of both problems (Footnotes 1 and 2), Hough is quite correct that the implications of these issues for our results were not spelled out. We take this opportunity to offer some clarifications with respect to the results in Kumar (1983).     

Unionization and absenteeism

Until recently any labour economist doing empirical work on unionization was concerned almost exclusively with the effect of unionization on wages. But beginning with Freeman's 1976 analysis of the rich institutional structure of unions, economists have been considering the role of unions in, for example, increasing productivity, lowering quit rates, enhancing fringe benefits, reducing income inequality, improving working conditions, and affecting a variety of other attributes at the workplace. ^{1 1}It is not the purpose of this paper to provide an exhaustive bibliography on the ‘new view’ of unionization. Nevertheless, the interested reader may want to see Freeman (1976, 1978, 1980) and Brown and Medoff (1978). To date, however, no study has directly addressed a question that appears ripe for empirical analysis: Does unionization affect absenteeism?

This paper presents results from a study designed to answer that question. The first section presents a simple model of absenteeism. The second section discusses the five mechanisms through which unionization influences absenteeism. The third section describes the data and variable selection. Results from logit regressions are presented in the fourth section and the paper closes with a summary of the arguments and evidence.     

Measurement of hospital case-mix: A note on alternative patient classifications

There is a general and growing displeasure with the commonly used methods by which hospital output is measured, and, therefore, with the methods for measuring hospital costs. ^{1 1}Discussions of output measurement problems may be found in REDER (1965), BERRY (1967), SOMERS and SOMERS (1967), LAVE and LAVE (1971), NEWHOUSE (1970), RAFFERTY (1971), and LEE and WALLACE (1971), among others. This disaffection springs largely from the questionable assumption of homogeneity that is implied when output is measured in the traditional units (number of patients or patient-days of care), for it is increasingly evident that output is not homogeneous in this respect. ^{2 2}For example, Lave and Lave have shown that hospitals do differ in the mix of the case-types which they treat (1971), and I have shown previously that case-type proportions vary in the short-run within the individual hospital system (1971 and 1972). Thus, attention is turning increasingly toward the measurement and analysis of case-mix behaviour, since these variations in the patient census reflect variations in output mix itself.

This study is limited to just one of the problems which arise in connection with any case-mix analysis, the problem of how to specify the case-types. Case-types may be identified by means of a few very broad categories or on the basis of the several thousand specific diagnoses, but there exists some trade-off between the degree of specificity and the ease of obtaining and handling the requisite empirical data. In the hope of facilitating future research efforts in this area, this paper examines several alternative methods of specifying the case-types, for the limited purpose of identifying differences among them in their sensitivity to case-mix variations.     

The Future of EU-Russia Energy Relations in the Context of Decarbonisation

In 2013, there was a joint commitment to “long term strategic EU-Russia energy cooperation”.¹1. EU/RF Roadmap, ‘Roadmap EU-Russia Energy Cooperation until 2050‘, European Commission and Russian Government, March 2013, p. 4, available at <https://ec.europa.eu/energy/sites/ener/files/documents/2013_03_eu_russia_roadmap_2050_signed.pdf>.View all notes Whilst centred on oil and gas, it is noted that “the importance of renewables for EU-Russia energy relations should grow too”,²2. Ibid., p. 21.View all notes and that for energy efficiency, “cooperation potential is immense and could… contribute to the objective of a Pan-European energy area”.³3. Ibid., p. 26.View all notes Given this shared objective, this article analyses EU and Russian energy decarbonisation policy objectives and considers the potential for a supplementary trade relationship based on renewable energy flows and decarbonisation-related technology, as well as the implications for existing energy trade. Despite declarative statements of mutual interest, shared objectives and cooperation in decarbonisation policy, there has been very limited cooperation by early 2016. The EU has set ambitious plans to decarbonise its economy and energy sector by 2050. However, in Russia energy policy is dominated by hydrocarbon exports, decarbonisation targets are modest, and there are major problems with their implementation. The drivers of EU and Russian energy policies are evaluated, and the argument advanced is that different understandings of energy security and types of energy governance provide major obstacles to decarbonisation cooperation and trade. However, it is argued that ideas about energy policy and security are contested and subject to change and there exists significant potential for mutual gain and cooperation in the longer term.     

Exchange market pressure: some caveats in empirical applications

The Exchange Market Pressure (EMP) index, developed by Eichengreen et al. (1994 Eichengreen, B, Rose, AK and Wyplosz, C. 1994. Speculative attacks on pegged exchange rates: an empirical exploration with special reference to the European monetary system, NBER Working Paper No. 4898  [Google Scholar]), is widely used as a tool to signal whether pressure on a currency is softened or warded off through monetary authorities’ interventions or, rather, a currency crisis has originated. In this article we show how the index is sensitive to some assumptions behind the aggregation of the information available (exchange rates, interest rates and reserves), especially when emerging countries are involved. Specifically, we address the way exchange rate variations are computed and the impact of different definitions of the reserves, and we question the constancy of the weights adopted. These issues compound with the choice of a fixed threshold when crisis episodes are identified through the EMP index. As a result, one should exert caution in subsequent econometric analyses where a dependent binary variable is built to identify crisis periods.     

Scale economies with regard to price adjustment costs and the speed of price adjustment in Australian manufacturing

This paper aims to examine the impact of firm size, industry concentration and the length of production on industry speed of price adjustment. To motivate the paper, an industry pricing model in error correction form is derived from firm pricing behaviour. As a new development, firms are assumed to have price adjustment costs that are a function of their size. The empirical model is estimated using two‐digit Australian manufacturing industry data for the period 1994:3 to 2006:1. The results suggest that the industry speed of price adjustment is positively related to firm size and negatively related to industry concentration and the production lag. Implied values for industry speeds of price adjustment are generally small when compared to other country industry studies. However, the industry average median lag of 7.1 quarters indicates a slightly faster speed of price adjustment than the estimate for the Australian consumer price index by Dwyer and Leong (2001 Dwyer, J. and Leong, K. 2001. Changes in the determination of inflation in Australia 1–44. Reserve Bank of Australia Research Discussion Paper 2001‐02 [Google Scholar]).     

The CBI Industrial Trends Survey — A Statistical Note

As the high tariff barriers of the inter-war period have been gradually reduced over the past twenty years, non-tariff factors have taken on an increasingly important role. One of the more notable of these factors is a country's level of excise taxes. Since these taxes are applied to both imports and domestic production, it is obvious that a given percentage change in excise taxes will have a smaller influence on trade than an equal percentage change in tariffs. Nevertheless, excise takes can be used to some extend as a substitution for tariffs. Hence, it would seem desirable to determine the degree to which such substitution will affect the volume of imports.

The role of taxes and tariffs in trade models has been considered in a number of theoretical discussions. ^{1 1} The effects of commodity taxes on the terms of trade and on domestic welfare have been analysed by MUNDELL, (1960), and by FRIEDLAENDER and VANDENDORPE (1968). However, virtually no effort has been made to examine the relationships among excise taxes, tariffs and imports in order to determine the extent to which countries can use excise taxes as a device to counterbalance the movement toward freer trade through the aegis of G.A.T.T. This study will attempt to rectify this omission.     

On the determinants of trade in services: evidence from the MENA region

This article examines the determinants of aggregate flows of service trade in MENA countries using an adapted version of the gravity model and a panel data set covering the 2000 to 2009 period for 21 countries and 10 sectors. A new determinant of trade performance is introduced: the number of bound commitments undertaken by a sector in the WTO as well as the availability of those commitments by mode of supply. The results show that being a WTO member boosts trade in services. In addition, the number of bound commitments increases exports, imports and trade in services. This positive and significant effect remains robust even after controlling for several econometric issues, namely, the selection bias related to the WTO membership and the endogeneity of commitments.¹1. We are grateful to the editor Mark Taylor and two anonymous referees for providing valuable comments and suggestions. We would also like to thank the participants to the ERF 18th Annual Conference and to the 32nd Annual Meeting of the Middle East Economic Association (MEEA). This work benefited from the financial support of Economics Research Forum (ERF). It does not reflect the Forum’s opinion.     

Divorce as a risky prospect

In 1910, the divorce rate per 1000 members of the US population stood at 0.9. ^{1 1}Histroical divorce rates can be found in the Statistical Abstract for the US (1981). . This rate showed a slow upward trend for the next 50 years, and by 1960 had more than doubled to 2.2. It took only 20 years for the rate to more than double again so that by 1980, the rate was 5.3. For the last 20 years, the marriage rate, by contrast, has experienced mild fluctuations between 10.0 and 11.0 per 1000 in the population with no discernible trend. If the same pattern for both rates holds until the year 2000, the annual number of divorces will exceed the annual number of marriages.

Although sociologists have researched divorce extensively, only a few economic studies exist. This is unfortunate since divorce is likely to have considerable impact on economic vaiables such as hours of work, labour force participation, human capital accumulation, work performance and earnings. ^{2 2}For a recent study of hours at work and labour supply, see Green and Quester (1982); for studies on earnings and work performance, see Santos (1975) or Hoffman and Holmes (1976). King (1982) argues that couples anticipating divorce will individually invest more heavily in human capital since the costs of any current investment are at least partially absorbed by the spouse. Without denying the influences of peer groups, social norms and role models, it seems reasonable to suggest that pecuniary considerations may also help to explain divorce.

A search through the economics literature uncovered only two studies of the determinants as opposed to the implications of divorce: one by Orcutt, Caldwell and Wertheimer (1976) and another by Becker, Landes and Michael (BLM) (1977). The study by BLM is by far the most widely cited of the two. The authors of both studies argue that the current state of marriage is the primary determinant of divorce. BLM, for example, assert that ‘the probability of divorce is smaller the greater the expected gain from marriage, and the smaller the variance of the distribution of unanticipated gains from marriage’. BLM, in other words, view marriage as a risky investment with a distribution of returns. The alternative is divorce which, by implication in BLM, involves a certain return.

The first contribution of this study is to draw the implications for an alternative view in which the investment in marraige is certain, but the investment in divorce is risky.

The second contribution lies in presenting formal expected utility-maximizing models of an individual and/or a couple contemplating divorce which can be tested empirically. The thrid contribution is the method developed to test the predictions of the models.

The paper of follows a simple format. Section I presents the models. Section II provides an explanation of the data used in the empirical tests. Methodology and results are presented in sections III and IV. Caveats are observed in section V. The final section closed with a summary of the arguments and evidence.     

The J-Curve: a literature review

Due to lag structure, currency devaluation is said to worsen the trade balance first and improve it later resulting in a pattern that resemble the letter J, hence the J-Curve phenomenon. Since its introduction by Magee in 1973 Magee, SP. 1973. Currency contracts, pass through and devaluation. Brooking Papers on Economic Activity, 1: 303–25.   (Brooking Papers on Economic Activity, 1, pp. 303–25), a large number of studies have attempted to test the phenomenon using different techniques and different model specifications. The results are at best ambiguous and deserve to be collected together for the future generation of researchers and graduate students. This paper fills such a vacuum in the literature by reviewing the J-Curve related empirical papers.     

The equilibrium relationship among money,income, prices,and interest rates: evidence from a threshold cointegration test

The long-run equilibrium relationship among money, income, prices, and interest rates in Japan is investigated by the threshold cointegration test, which allows for asymmetric adjustment, introduced by Enders and Siklos (2001 Enders, W and Siklos, PL. 2001. Cointegration and threshold adjustment. Journal of Business and Economic Statistics, 19: 166–76. [Taylor &; Francis Online], [Web of Science ®] , [Google Scholar]). The threshold cointegration approach provides clear evidence of the cointegration relationship characterized by asymmetric adjustment. By allowing for asymmetric adjustment, results are obtained showing the stability of the money demand function, similar to Lucas (1988 Lucas, RW Jr. 1988. Money demand in the United States: a quantitative review. Carnegie-Rochester Conference Series on Public Policy, 29: 137–68.  [Google Scholar]), who pointed out that the money demand function is stable if unit income elasticity is imposed. In particular, the estimated results show that the adjustment process toward equilibrium is highly persistent above an appropriately estimated threshold, whereas the adjustment process toward equilibrium quickly converges below it. This finding indicates that deviations from equilibrium resulting from increases in money or decreases in income and prices are highly persistent.     

A trend filtering method closely related to $$\ell _{1}$$ trend filtering

The filtering method developed by Kim et al. (SIAM Rev 51:339–360, 2009), \(\ell _{1}\) trend filtering, is attractive because it enables us to estimate a continuous piecewise linear trend. This paper introduces a new filtering method closely related to \(\ell _{1}\) trend filtering in order to contribute to the accumulation of knowledge on \(\ell _{1}\) trend filtering. We show that the piecewise linearity, which is the key feature of \(\ell _{1}\) trend filtering, is derived from the new filtering. For this reason, we refer to the filtering as ‘pure’ \(\ell _{1}\) trend filtering. We also demonstrate some other miscellaneous results concerning the new filtering.     

Cost-effectiveness of selective internal radiation therapy using yttrium-90 resin microspheres in treating patients with inoperable colorectal liver metastases in the UK

Abstract

Objective:

Selective internal radiation therapy (SIRT) using SIR-Spheres® ⁹⁰Y-labeled resin microspheres has been shown to be a well-tolerated, effective treatment in patients with inoperable liver-dominant chemotherapy–refractory metastatic colorectal cancer (mCRC). This study estimated the cost-effectiveness of ⁹⁰Y-resin microspheres compared to best supportive care (BSC) from a UK perspective.     

What factors inspire the high entry flow in Taiwan's manufacturing industries–A count entry model approach

Why is the entry flow of the manufacturing sector extremely high in Taiwan, and does it contribute to the prevailing entrepreneurship? This article aims to explore what factors inspire potential entrants to go into an industry. Based on a theoretical formulation of the Poisson probability entry model, a count data model is employed to investigate the determinants of entry flows. The empirical results reveal that traditional entry barriers indeed lower the entry flow. The entry incentives, including price cost margin and industry growth, play a lesser role at attracting new firms, while alternatively the market size acts as a better proxy of an entry incentive in explaining entry flows. Incumbents’ responses to entry, R&;D and advertising intensity are found to be associated with a significant negative impact on entry flows. This article also finds that there is a higher bound of covariate of entry, about 10%, that can be attributed to the immeasurable personality of entrepreneurs–entrepreneurship.

Rather be the chicken's beak than be the cow's behind. 1 ¹?This proverb explains in terms the concept of choosing jobs as how one would like to be a leader of a small firm rather than an employee in a large enterprise.

The trade that might cause life hazard will be dealt, while the trade that might cause a loss will not be dealt.

Two traditional Chinese proverbs     

Employer payroll taxes and money wage behaviour

In the past ten years tax incidence theory has made a number of strides. Terminology has become standardized, assumptions have been made explicit, and a two sector, two factor, I static general equilibrium model to study incidence questions has been developed and elaborated. Rather than review these developments in any detail, it is sufficient here to note a sampling of these writings, namely the works of MUSGRAVE (1959, Ch. 10), HARBERGER (1962), MIESZKOWSKI (1967), MCLURE (1971) and MEISZKOWSKI'S (1969) summary of this litera-ture. ^{1 1} The models under consideration are essentially short run in nature. For present purposes the works of KRZYZANIAK (1968, 1970) on long run incidence are not being considered. View all notes

A central theme in this literature has been to emphasize the importance of relative price changes in the determination of tax incidence. At the same time it plays down the importance of the direction of shifting (forward or backward) which had been a prominent feature of earlier partial equilibrium incidence analysis. One purpose of the present paper is to argue that in actual empirical situations it is necessary to consider the behaviour of absolute prices in determining the incidence of a specific tax, the employer payroll tax.

There are four parts to the paper. Part I reviews the general equilibrium model and its conclusions on payroll tax incidence. The implications of forward shifting, backward shifting and payment of payroll taxes by employers are discussed in Part II. Results of a test for back-ward shifting of the tax in US manufacturing are reported in Part III. Part IV contains conclusions.

Two conclusions emerge from the analysis. (I) In the general equilibrium models under consideration the employer payroll tax is borne by labour. However, care must be taken in applying this conclusion to a real world situation where transfer payments are a component of family income. (2) Empirical tests in US manufacturing do not support the idea that the I employer tax is shifted totally backward onto money wages.     

Bilateral J-curve between India and her trading partners

This paper aims to test whether a given type of process innovation, namely flexible production technologies (FPTs), contributes to increased firm efficiency. Using one-year firm data from the Portuguese manufacturing industry and applying a parametric stochastic frontier approach, individual technical efficiencies are obtained and their determinants simultaneously estimated, using a single-step procedure recently proposed by Battese and Coelli (1995 Battese, G and Coelli, T. 1995. A model for technical inefficiency effects in a stochastic frontier production function and panel data. Empirical Economics, 20: 325–32.  ). The results support the hypothesis that technological flexibility, measured through the use of FPTs, is important in explaining differences in efficiency. Furthermore, given the specifications of the stochastic frontier function, the null hypothesis that Portuguese firms are fully technically efficient is rejected.     

Forecasting profitability and earnings: a study of the UK market (1982–2000)

An approach recently developed by Fama and French (2000 Fama, EF and French, KR. 2000. Forecasting profitability and earnings. The Journal of Business, 73: 161–75.  ) is applied to the study of whether UK company profitability is mean-reverting. A sample of roughly 987 firms per year for a period from 1982–2000 is used, drawn from Datastream. In a simple partial adjustment model convergence towards the mean at a rate of about 25% per year is found. The results are very similar in direction to those of Fama and French (2000 Fama, EF and French, KR. 2000. Forecasting profitability and earnings. The Journal of Business, 73: 161–75.  ) but the results do not display significant non-linearities. The change in profitability appears to be more strongly influenced by dividends in the UK.     

Exchange rate pass-through in a small open economy: the Anglo-Irish case

Bilateral import unit values are constructed to investigate the extent and speed of exchange rate and production cost pass-through into the unit values of Irish imports (total and sectoral) from the UK using Menon's (1996 Menon, J. 1996. The degree and determinants of exchange rate pass-through: market structure, non-tariff barriers and multinational corporations. Economic Journal, 106(435): 434–44.  ) mark-up model. The approach used to measure exchange rate pass-through is based on cointegration and error-correction modelling and the period of analysis is from 1979 to 1995. Full pass-through from the bilateral Irish pound–Sterling exchange rate and from UK producer costs could not be rejected for total and sectoral import unit values for the sample period 1979q1–1995q4. This implies no role for domestic competing prices in explaining the long-run relationship determining unit values of Irish imports from the UK. The results indicate that for aggregate and sectoral unit values of Irish imports from the UK pass-through is incomplete in the short-run.