Retail Shelf Allocation: A Comparative Analysis of Heuristic and Meta-Heuristic Approaches

This research presents a retail shelf-space decision model that incorporates a nonlinear profit function, vertical and horizontal location effects, and product cross-elasticity. We propose a linear programming formulation of the nonlinear profit function that can solve the shelf-space problem optimally. We describe potential advances in heuristic and meta-heuristic algorithms and compare the approaches through simulations and a field experiment. We discuss the impact of the number of item facings, vertical location, and horizontal location (e.g., we find the vertical location effect is approximately double the size of the horizontal location effect on profit performance).     

Consumer values,the theory of planned behaviour and online grocery shopping

Taking a hierarchical value‐attitude‐behaviour approach, this study empirically tests relations of consumer personal values, attitude, social norm, perceived behavioural control (PBC) and willingness to buy groceries online. The study distinguishes three groups of consumers: consumers who have not yet bought anything on the Internet; consumers who have bought something on the Internet – but not groceries; and consumers who have bought something on the Internet – including groceries. Data were collected from an online survey of Swedish consumers (n = 1058) using self‐administered questionnaires. The findings suggest that consumers may link personal values to attitude towards online grocery buying – but also that this relation may be moderated by whether the consumer previously has carried out an online purchase or an online grocery purchase.     

The Sustainability Balanced Scorecard: A Systematic Review of Architectures

The increasing strategic importance of environmental, social and ethical issues as well as related performance measures has spurred interest in corporate sustainability performance measurement and management systems. This paper focuses on the balanced scorecard (BSC), a performance measurement and management system aiming at balancing financial and non-financial as well as short and long-term measures. Modifications to the original BSC which explicitly consider environmental, social or ethical issues are often referred to as sustainability balanced scorecards (SBSCs). There is much scholarly discussion about SBSC architecture and how it can be designed to relate performance dimensions, strategic objectives and the logical links among these elements. To synthesise the widely scattered research findings and publications on the SBSC, we conducted a thematic analysis based on a systematic literature review containing 69 relevant articles spanning a period of two decades. We found that sustainability-oriented modifications of the BSC architecture are motivated by instrumental, social/political or normative theoretical perspectives. Moreover, these modifications can be mapped with a typology of generic SBSC architectures. The first dimension of the typology describes the hierarchy between performance perspectives and strategic objectives and how it is related to the organisational value system. The second dimension describes how sustainability-related strategic objectives are integrated into SBSC performance perspectives and how this is related to corporate sustainability strategy. This study contributes to the development of the emerging SBSC literature and practice and, more generally, to research on corporate sustainability performance measurement and management. We conclude with a research agenda and implications for management.     

The robustness of the Sarbanes Oxley effect on the U.S. capital market

We examine the incidence of new listings and delistings on U.S. stock exchanges and firms’ propensity to delist, as a function of general market conditions, firm fundamentals, and the costs of compliance with the Sarbanes Oxley Act (SOX). We find that both general market conditions and firm fundamentals explain the delisting incidence and firms’ delisting decisions; while SOX variables are positively associated with firms’ delisting likelihood only when general market conditions are not included in the analyses. Further analyses on the population partitioned into size quintiles suggest that the passage of SOX was not associated with an increase in the likelihood of delisting for any size quintile of firms and that the implementation of SOX section 404 is positively associated with the delisting likelihood for midsized and larger firms. Our empirical evidence is useful to regulators as they consider changes in the imposition and implementation of SOX section 404.     

Air Pollution and Sick-leaves

During the last decade an increasing amount of studies have investigatedthe relationship between air pollution and human health effects. In thisstudy we investigate how these effects in turn induce reduced labourproductivity in terms of sick-leaves, which is an important factor inassessment of air pollution costs in urban areas. For this purpose weemploy a logit model along with data on sick-leaves from a large office inOslo and different air pollutants. Our results indicate that sick-leaves aresignificantly associated with particulate matter (PM₁₀), while theassociations with SO₂ and NO₂, are more ambiguous. We also tryto estimate the induced social costs in terms of lost labour productivity andincreased governmental expenditures, although these estimates are moreuncertain.     

Transition from unemployment benefits to social assistance in seven European OECD countries

The topic of this paper is the transition from unemployment benefit schemes to social assistance in seven European OECD countries. The unemployment benefit schemes are formally quite different in the seven countries. Most are mandatory but Denmark and Sweden have voluntary unemployment insurance and Finland has a mandatory basic scheme with a voluntary income related component on top of that. Self employed people can join the U.B. schemes in the 3 Scandinavian countries. All the U.B. schemes have working or contribution conditions to be met by the members in order to obtain eligibility for benefits. These conditions are relatively tight in the Netherlands, France and Sweden and relatively easy in Denmark and Great Britain with Germany and Finland in between (based on rules in 1994–95). Recent developments in several countries have been to tighten the access conditions to the U.B. schemes and from 1997 Denmark will be ‘on line’ with Germany. The Netherlands have tightened the access criteria very significantly in 1995. There is a considerable variation as far as the duration of the unemployment benefit period is concerned. Sweden has a benefit period in fact without effective time limitations. The Danish benefit period is also very long, 7 years now being reduced to 5 years. 5 years is also the maximum duration in the Netherlands and in France, but only after many years of work and after a relatively high age has been reached. The maximum period in Germany, 22/3 years, also requires a long work history and a relatively high age. Finland and Great Britain have uniform benefit period (just as in Denmark and Sweden), in Finland it is appr. 2 years (longer for elderly unemployed just as in Sweden and Denmark) and in Great Britain it was 1 year but from October 1996 it was reduced to 1/2 year. The differences in the duration of the benefit periods between the seven countries are very considerable. As already mentioned, there has been a tendency to reduce the benefit period in several countries. Such a change is also being considered for the ‘never ending’ benefit period in the Swedish U.B. scheme. The benefit formula is purely flat rate in Great Britain and income related in the other countries. There is a maximum benefit level in 5 of these countries, but not in Finland, where the compensation is stepwise decreasing with increasing income. In the 5 countries with income related benefits and a maximum benefit level, this maximum level is reached at a relatively low income in Denmark (2/3 APW income) and Sweden (close to APW income) and at a relatively high income in the Netherlands (appr. 1.5 APW income) and Germany (appr. 1.7 APW income) and at a very high income level in France. France is the only country among the 7, where the benefits after an initial period are being reduced regularly (every 4 months) in the benefit period down to a minimum level. Sweden and Germany have reduced the benefit levels in recent years. Denmark has the highest gross compensation percentage, 90, in relation to lost income, but it is only effective over a relatively narrow income interval, from approx. 133,000 DKK to 162,000 DKK (1996), ‘between’ the min. and max. U.B. rates. According to the 3 institutional criteria applied here, access to the schemes, duration of the benefit period and the type of benefit formula, the U.B. schemes of the seven countries studied are very different. The exit scheme from U.B is social assistance in most of the countries, but not in Germany, where it is possible to continue in a scheme with lower compensation but still income related. For Sweden it is hardly meaningful to speak of an ‘exit scheme’ when the U.B. insurance is without effective time limitations. The exit schemes in the other countries are all characterized by having flat rate benefits. All the exit schemes are means tested and this is a crucial difference to the U.B. schemes, and they are without time limitations. Means testing and no effective time limitations are usual characteristics for social assistance and social assistance like schemes. In all the countries, except in Denmark and Sweden, there is ‘topping-up’ from social assistance to a guaranteed minimum level disregarding the income sources. In the two Scandinavian countries mentioned, a ‘social event’, i.e. illness or unemployment, is required in order to be eligible for social assistance benefits. Net replacement rates are used to illustrate the levels of compensation within the U.B. and the S.A. schemes, to identify possible incentives problems, and to illustrate the economic implications of the transition from U.B. to S.A. schemes. The net replacement rates presented are calculated by using the ‘disposable income after net housing costs’ income concept. The calculations include several family types, singles and couples with and without children and for the couples with one or two incomes. A general result but with some modifications, cf. the following, could be that the U.B. based replacement rates usually are higher than the S.A. based, but that the difference is minor when the U.B. scheme is flat rate or income related with a maximum benefit level being reached at a relatively low income, for Great Britain there are in several cases no difference at all. The ‘topping-up’ has the implication that the U.B. and S.A. based replacement rates are often identical at the lower end of the income scale. The very high S.A. based replacement rates (well over 100 per cent) often seen for Denmark and Sweden at low income levels do not necessarily imply, that social assistance in those two countries is more generous than in the other countries, it is very much an effect of not having more or less automatic ‘topping-up’ to a guaranteed minimum income level when earned income is low. The single parent family type seems to have incentives problems at relatively low income levels in most of the countries, especially when receiving U.B., she may temporarily be caught in the ‘unemployment trap’. The one earner couple with children may also be exposed to the ‘unemployment trap’ but on a more permanent basis. The S.A. based replacement rates for this family type are extraordinarily high (and higher than the U.B. based) in Denmark and Sweden, where this family type, however, is very rare. For the two earner family (where one of the spouses always has earned income) the means testing of S.A. makes an impact on the S.A. based net replacement rates, they are in most cases substantially lower than the U.B. based. The results of the net replacement calculations indicate no or only minor economic implications by a transition from U.B. to S.A. in the lower end of the income scale while the effect in most cases will be more substantial in the higher end of the income scale. This is not always the case in Sweden and Denmark where S.A. for some family types are preferable to U.B. and where the difference in other cases may be so small, that it implies incentives problems for joining the voluntary U.B. scheme. The calculation of ‘long term’ (5 years) net replacement rates for families at a low income level (the point in the income distribution where only 5 per cent have lower income) and only including one earner families, reveals that either the long benefit period in the U.B. scheme (Sweden and Denmark) or ‘topping-up’ (Germany, the Netherlands and Great Britain) generate ‘constant’ net replacement rates, and quite high ones, at low income levels. Only in France and to some extent in Finland will there be a decrease in net replacement rates over time. Most of the differences concerning the duration of unemployment benefit periods and to some extend the benefit formulas have no effect on the long term net replacement rates. At higher income levels the time limitations in the U.B. schemes will be visible again, except in Great Britain where the U.B. and S.A. benefits are almost identical. It is not possible to point out a ‘worst’ country with respect to ‘incentives’ problems, but the Danish, and to some degree also the Swedish, U.B. schemes with their high net replacement rates at lower income levels and long duration periods ‘stand’ out in many cases, and the S.A. schemes in those two countries may also contribute to permanent ‘unemployment traps’ as well as lack of incentives to join the voluntary insurance schemes. The two Scandinavian countries are, however, not alone with ‘incentives problems’. The section on long term net replacement rates showed that for low income levels the replacement rates were high and constant in most countries. This result is often due to ‘topping-up’ to a guaranteed minimum standard.     

The Economic Cost of Growing Up Poor: Estimating the GDP Loss Associated with Child Poverty*

One of the motivations for the UK government's target to reduce (and eventually eliminate) child poverty is the perception of a significant long‐term economic cost of growing up in poverty. This perception arises from the observation that individuals who experience poverty in their childhood earn less as adults, are less likely to be in employment, are more likely to engage in criminal or anti‐social activities and are more likely to experience poor health and lower life satisfaction. This paper quantifies these effects, and expresses them in terms of GDP losses to the nation. We begin by focusing on lost earnings that arise from poorer skills and reduced employment opportunities, and then move on to the wider costs associated with the higher crime rates, poorer health and reduced well‐being that are linked with growing up poor. We find a sizeable economic cost, with the cost of growing up in poverty amounting to at least 1 per cent of GDP.     

Ethnocentrism and Domestic Food Choice: Insights From an Affluent Protectionist Market

This study has investigated the domestic food choices of consumers in an affluent protectionist market, and the role of consumer ethnocentrism in relation to those choices. A short focus group method called CurroCus-groups were chosen for the study. Seven group interviews were conducted with a total of 54 respondents. The data was analyzed using a two level Grounded Theory approach. The analysis resulted in two main categories and five subcategories, all indicating the consumers’ different reasons for choosing domestic food. The two main categories are social involvement and quality whereas the five subcategories are sensory quality, food safety, products, environmental care and Jobs and producers. Consumer ethnocentrism was discussed in relation to the categories and different levels of consumer ethnocentrism were found in some, but not all of the categories.     

Boiler and machinery protection through control of piping reactions

The effect of the three main classes of mechanical piping reactions (sustained, displacement, and dynamic), and the significant problems of accurate calculation, proper construction, operation, and maintenance.