Ubiquitous yet Ambiguous: An Integrative Review of Unpaid Work

The expansion of participation in unpaid work such as internships, volunteering and educationally focused work placements may constitute evidence of deleterious changes to labour markets increasingly characterized by competition, precarious work and prolonged transitions to secure employment. Unpaid work, although under‐researched, is increasingly relevant in times of ubiquitous unpaid internships and the use of volunteers in roles that would have been previously paid. Yet there remains a lack of clarity in terminology and focus across studies of unpaid work. This review article addresses this concern through two primary aims. First, we review the available literature around unpaid work setting out five themes: characterizations of unpaid work; the prevalence and underlying drivers of unpaid work; the apparent benefits of participation; the costs of participation; and regulatory and structural responses to unpaid work. Together, these themes set out a holistic interpretation of the accumulated state of knowledge in this area of inquiry including the implications for organizations, employers, higher education institutions, policy makers and unpaid workers. The second aim is to synthesise the current and emerging insights arising from the review as a matrix which delineates four distinct forms of unpaid work along two dimensions – purpose of participation and level of participatory discretion. The review and resulting matrix provides conceptual clarity around unpaid work practices that informs future research. It also raises pragmatic implications for institutional and managerial decision‐making which is cognisant of the range of risks, costs, benefits and ethical issues associated with unpaid work.     

Low‐wage Jobs — Springboard to High‐paid Ones?

We examine whether low‐paid jobs have an effect on the probability that unemployed persons obtain better‐paid jobs in the future (springboard effect). We make use of data from the German Socio‐Economic Panel (SOEP) and apply a dynamic random effects bivariate probit model. Our results suggest that low‐wage jobs can act as springboards to better‐paid work. The improvement of the chance to obtain a high‐wage job by accepting low‐paid work is particularly large for less‐skilled persons and for individuals who experienced longer periods of unemployment. Low‐paid work is less beneficial if the job is associated with a low social status.     

ON‐THE‐JOB SEARCH AND MORAL HAZARD

We analyze the interaction between intertemporal incentive contracts and search frictions associated with on‐the‐job search. In our model, agency problems call for wage contracts with deferred compensation. At the same time workers do on‐the‐job search. Deferred compensation improves workers' incentives to exert effort but distorts their on‐the‐job search decisions. We show that deferred compensation is less attractive when the value to the worker–firm pair of on‐the‐job search is high. Moreover, the interplay between search frictions and wage contracts creates feedback effects. If firms in equilibrium use contracts with deferred compensation, fewer firms with vacancies enter the on‐the‐job search market, and this in turn reduces the distortions created by deferred compensation. These feedback effects between the incentive contracts used and the activity level in the search markets can lead to multiple equilibria: a low‐turnover equilibrium where firms use deferred compensation, and a high‐turnover equilibrium where they do not. Furthermore, the model predicts that firms are more likely to use deferred compensation when search frictions are high and when the gains from on‐the‐job search are small.     

The Effect of Delayed Incentives on Supply Chain Profits and Consumer Surplus

We examine the use of consumer cash mail‐in rebates offered by a manufacturer in a Stackelberg game where the manufacturer is the leader and the retailer is the follower. Our analysis indicates that rebates are profitable for manufacturers if consumers are inconsistent in the sense that their rebate valuation when they make purchase decisions is independent of their redemption probabilities when they make redemption decisions. If the manufacturer keeps the wholesale price unchanged, then the rebate increases the retailer's profit by a larger amount than the increase in the manufacturer's profit. If the manufacturer jointly optimizes the wholesale price and rebate, then the increase in the manufacturer's profit is twice the increase in the retailer's profit. The retailer responds to rebates by increasing the retail price, which increases the margin paid by consumers who do not redeem the rebate. On average, consumer surplus decreases when it is optimal for manufacturers to offer rebates. We suggest incentive schemes that make it worthwhile for retailers to limit the price increase. In these incentive schemes, the manufacturer imposes a negative relationship between the rebate value and the retail price. We show that such incentives increase supply chain profits.     

Investigating Unpaid Overtime Working among the Part‐time Workforce

This paper considers whether unpaid overtime working relates to contracted working hours (i.e. whether an employee works part‐time or full‐time) in Britain. It uses the authoritative 2004 British data set Workplace Employment Relations Survey to derive a sample of 4,530 workers, from 735 workplace establishments, who worked unpaid overtime. It tests hypotheses linking contracted working hours to unpaid overtime, and whether this link is moderated by gender, occupational group and the availability of flexible working arrangements. Part‐time workers were found to work significantly more unpaid overtime hours compared with their full‐time counterparts. Gender, occupation and flexible working practices moderated this relationship, where the extent to which part‐timers work more unpaid overtime than their full‐time counterparts was greater for men than for women, was greater for professional/managerial part‐time workers compared with other occupations, and was more evident in establishments less likely to offer flexible working arrangements. The findings raise concerns about the exploitation of part‐time workers.     

Panel Size and Overbooking Decisions for Appointment‐Based Services under Patient No‐Shows

Many service systems that work with appointments, particularly those in healthcare, suffer from high no‐show rates. While there are many reasons why patients become no‐shows, empirical studies found that the probability of a patient being a no‐show typically increases with the patient's appointment delay, i.e., the time between the call for the appointment and the appointment date. This paper investigates how demand and capacity control decisions should be made while taking this relationship into account. We use stylized single server queueing models to model the appointments scheduled for a provider, and consider two different problems. In the first problem, the service capacity is fixed and the decision variable is the panel size; in the second problem, both the panel size and the service capacity (i.e., overbooking level) are decision variables. The objective in both cases is to maximize some net reward function, which reduces to system throughput for the first problem. We give partial or complete characterizations for the optimal decisions, and use these characterizations to provide insights into how optimal decisions depend on patient's no‐show behavior in regards to their appointment delay. These insights especially provide guidance to service providers who are already engaged in or considering interventions such as sending reminders in order to decrease no‐show probabilities. We find that in addition to the magnitudes of patient show‐up probabilities, patients' sensitivity to incremental delays is an important determinant of how demand and capacity decisions should be adjusted in response to anticipated changes in patients' no‐show behavior.     

The Role of Entrepreneurship in the Context of Career Trajectories: Moving Back into Wage Employment or into Unemployment?

This study investigates patterns of movement from self‐employment to wage employment or to unemployment in Belgium. Non‐parametric techniques and complimentary log–log analyses are used to determine the significance of stable individual traits (e.g. gender) and of time‐dependent characteristics (e.g. family and organizational context, labour market mobility) in moving back to wage employment or to unemployment. Evidence is provided on the possibility of entrepreneurship acting as a ‘steppingstone’ between long‐term unemployment and paid work. Yet, significant relationships also emerge between ex‐ante time spent in unemployment and the possibility of continued unemployment upon self‐employment exit.     

THE INEFFICIENCY OF WORKER TIME USE

Much work is carried out in short, interrupted segments. This phenomenon, which we label task juggling, has been overlooked by economists. We study the work schedules of some judges in Italy documenting that they do juggle tasks and that juggling causally lowers their productivity substantially. To measure the size of this effect, we show that although all these judges receive the same workload, those who juggle more trials at once instead of working sequentially on few of them at each unit of time, take longer to complete their portfolios of cases. Task juggling seems to have no adverse effect on the quality of the judges' decisions, as measured by the percent of decisions appealed. To identify these causal effects we estimate models with judge fixed effects and we exploit the lottery assigning cases to judges. We discuss whether task juggling can be viewed as inefficient, and provide a back‐of‐the‐envelope calculation of the social cost of longer trials due to task juggling.     

THE QUANTITATIVE ROLE OF CHILD CARE FOR FEMALE LABOR FORCE PARTICIPATION AND FERTILITY

I document that the labor force participation rate of West German mothers with children aged zero to two exceeds the corresponding child‐care enrollment rate, while the opposite is true for mothers whose children are older than two but below the mandatory schooling age. These facts also hold for a cross‐section of E.U. countries. I develop a life‐cycle model that explicitly accounts for this age‐dependent relationship by including various types of nonpaid and paid child care. I calibrate this model to data for West Germany and use the calibrated model for policy analysis. Increasing the supply of subsidized child care for children aged zero to two generates an increase in the maternal labor force participation rate consistent with empirical evidence from other settings; however, this increase is too small to conclude that the lack of subsidized child care accounts for the low labor force participation rate of mothers with children aged zero to two. The response along the intensive margin suggests that a large fraction of part‐time working mothers would work full‐time if they had greater access to subsidized child care. Finally, making subsidized child care available to more women does not achieve one of the commonly stated goals of such reforms, namely to increase the fertility rate.     

David v. Goliath: A Brief Assessment of the U.S. Supreme Court's 2011 Ruling Denying Class Certification in Dukes v. Wal‐Mart

In 2001, Betty Dukes, then a 54‐year‐old African American, filed suit against her employer, Wal‐Mart, alleging that she had been the victim of gender discrimination. Ms. Dukes alleged that Wal‐Mart, the nation's largest private employer, routinely paid women less than men for comparable work and arbitrarily favored men over women in promotion decisions. In 2004, a U.S. District Court entered an order granting class certification, potentially extending the retailer's financial liability to thousands of current and past Wal‐Mart employees. At that time, the Wal‐Mart suit was the largest class action lawsuit ever approved in the United States. In 2011, the U.S. Supreme Court reversed the lower court's ruling. Writing for the majority, Justice Scalia cited Wal‐Mart's long‐standing explicit gender‐neutral employment policy and the decentralized manner in which local managers have discretion to adjust salaries and recommend applicants for promotion—factors that led the majority to question “the glue” binding the class together. Proponents of the Court's decision hailed the ruling as a victory for business and a step in the direction of needed legal reform. Critics viewed the decision as another in a series of defeats for minority interests by a pro‐business, ideologically divided Court. Did the Court get it right, or is this yet another example of might defeating right?     

Join the Union and Be Safe: The Effects of Unionization on Occupational Safety and Health in the European Union

This paper investigates the effect of unionization on occupational safety and health, as measured by the fatal and non‐fatal work accidents, after controlling for the country's gross domestic product. It uses a panel sample of 10 European Union countries, for the period 1982–2006. The study takes into account the time persistence in work injuries and the endogenous nature of the work injuries–union density relationship. In addition, the effect of union density is decomposed into a temporary and permanent effect. It is shown that increasing union density is associated with a decrease in the number of both fatal and non‐fatal work injuries.     

Determinants of the Annual Duration of Sickness Presenteeism: Empirical Evidence from European Data

Sickness presenteeism, i.e. going to work while sick, can cause substantial productivity losses. Focusing on work‐related characteristics, we investigate the determinants of the annual duration of sickness presenteeism using representative European cross‐sectional data. We find work autonomy, workload, tenure, and the work environment to be the quantitatively most relevant determinants of sickness presenteeism days. Work autonomy (control over one's work, being supervisor), workload (weekly working hours, time pressure), and tenure are positively related to the number of sickness presenteeism days. In contrast, a good work environment (good working conditions and social support) comes along with fewer presenteeism days.     

Heterogeneous Firm Responses to Rising Teenage Wages

Substantial youth minimum wage changes in New Zealand between 2000 and 2007 raised teenage average wages by 5–10 per cent relative to those for adults. We use Statistics New Zealand's Linked Employer–Employee Database (LEED) to examine whether firms' teenage labour demand responses to these changes are greater for firms with higher teenage‐employment share. We find evidence that high teen‐employers reduced their teen employment relative to other firms and had lower survival rates over the period. However, firms that entered the main teen‐employment industries had higher teen‐employment shares than continuing firms. The results are consistent with endogenous technology adoption in response to non‐marginal changes in relative wages.     

Competing on Time: An Integrated Framework to Optimize Dynamic Time‐to‐Market and Production Decisions

This study develops a comprehensive framework to optimize new product introduction timing and subsequent production decisions faced by a component supplier. Prior to market entry, the supplier performs process design activities, which improve manufacturing yield and the chances of getting qualified for the customer's product. However, a long delay in market entry allows competitors to enter the market and pass the customer's qualification process before the supplier, reducing the supplier's share of the customer's business. After entering the market and if qualified, the supplier also needs to decide how much to produce for a finite planning horizon by considering several factors such as manufacturing yield and stochastic demand, both of which depend on the earlier time‐to‐market decision. To capture this dependency, we develop a sequential, nested, two‐stage decision framework to optimize the time‐to‐market and production decisions in relation to each other. We show that the supplier's optimal market entry and qualification timing decision need to be revised in real time based on the number of qualified competitors at the time of market‐entry decision. We establish the optimality of a threshold policy. Following this policy, at the beginning of each decision epoch, the supplier should optimally stop preparing for qualification and decide whether to enter the market if her order among qualified competitors exceeds a predetermined threshold. We also prove that the supplier's optimal production policy is a state‐dependent, base‐stock policy, which depends on the time‐to‐market and qualification decisions. The proposed framework also enables a firm to quantify how market conditions (such as price and competitor entry behavior) and operating conditions (such as the rate of learning and inventory/production‐related costs) affect time‐to‐market strategy and post‐entry production decisions.     

Analysing Wage Differences between the USA and Germany Using Proportional Hazards Models

We analyse differences between the wage distributions in the USA and Germany in 2001 for both women and men. The empirical analysis is based on the decomposition of differences using Cox's marginal (partial) likelihood. The approach based on rank invariant estimators such as Cox's is borrowed from the literature on failure time data. Donald et al. pioneered this approach in 2000. However, they did not use the full power of the semi‐parametric approach. Instead, they argued for using a piecewise constant hazard rate model. We improve on their work by showing that the semi‐parametric features of Cox's marginal likelihood are as appropriate for the analysis of wage decompositions and as easy to interpret. Moreover, we extend their approach by allowing for non‐linear regression effects. We show empirically that this formulation both increases the flexibility of their approach and improves the discriminatory power between wage regimes.     

Investing in a Shared Supplier in a Competitive Market: Stochastic Capacity Case

When firms invest in a shared supplier, one key concern is whether the invested capacity will be used for a competitor. In practice, this concern is addressed by restricting the use of the capacity. We consider what happens when two competing firms invest in a shared supplier. We consider two scenarios that differ in how capacity is used: exclusive capacity and first‐priority capacity. We model firms' investment and production decisions, and analyze the equilibrium outcomes in terms of the number of investing firms and capacity levels for each scenario; realized capacity is a stochastic function of investment levels. We also identify conditions under which the spillover effect occurs, where one firm taps into the other firm's invested capacity. Although the spillover supposedly intensifies competition, it actually discourages firms' investment. We also characterize the firms' and supplier's preference about the capacity type. While the non‐investing firm always prefers spillovers from the first‐priority capacity, the investing firm does not always want to shut off the other firm's access to its leftover capacity, especially when allowing spillover induces the other firm not to invest. The supplier's preference depends on the trade‐off between over‐investment and flexibility.     

Focusing on Customer Time in Field Service: A Normative Approach

Although customer convenience should be rightfully considered a central element in field services, the customer experience suggests that service enterprises rarely take the customer's preferred time into account in making operational and scheduling decisions. In this paper we present the results of our exploratory research into two interrelated topics: the explicit inclusion of customer time in nonemergency field service delivery decisions and the analysis of trade‐off between the customer's convenience and field service provider's cost. Based on prior research in service quality we identify and illustrate two time‐based performance metrics that are particularly appropriate for assessing service quality in nonemergency field services: performance and conformance quality. To determine vehicle routes, we develop a hybrid heuristic derived from the existing and proven heuristic methods. A numerical example closely patterned after real‐life data is generated and used within a computational experiment to investigate alternate policies for promise time windows. Our experiment shows that over a reasonable range of customer cost parameters the policy of shorter promise time windows reduces the combined total cost incurred by the provider and the customers and should be considered a preferred policy by the field service provider. Managerial implications of this result are discussed.     

Managing Technology Selection and Development Risk in Competitive Environments

Managing development decisions for new products based on dynamically evolving technologies is a complex task, especially in highly competitive industries. Product managers often have to choose between introducing an incrementally better, safe new product early and a superior, yet highly risky, product later. Recommendations for managing such performance vs. time‐to‐market trade‐offs often ignore competitive reactions to development decisions. In this paper, we study how a firm could incorporate the presence of a strategic competitor in making technology selection and investment decisions regarding new products. We consider a model in which an innovating firm and its rival can introduce a new product immediately or pursue a more advanced product for later launch. Further, the firm can reduce the uncertainty surrounding product development by dedicating more resources; the effectiveness of this investment depends on the firm's innovative capacity. Our model generates two sets of insights. First, in highly competitive industries, firms can adopt different technologies and effectively use introduction timing to mitigate the effects of price competition. More importantly, the firm could strategically invest in the advanced product to influence its rival's technology choice. We characterize equilibrium development and investment decisions of the firms, and derive innovative capacity hurdles that govern a firm's choice between the risky and safe alternatives. The effects of development flexibility—where firms might have the option to revert to the safe product if the advanced product fails—are also considered.     

Endogenous Adaptation: The Effects of Technology Position and Planning Mode on IT‐Enabled Change*

The redesign of information technology (IT)‐enabled work processes often necessitates fundamental design changes to the intended work process, the IT platform hosting the work process, or both. Research suggests that such design changes often can be traced to earlier decisions involving endogenous adaptation or internal organizational change. Two such decisions are a firm's technology position and planning mode. This study examines the relationship between technology position and planning mode in predicting the magnitude of design change in process redesign projects. The conceptual frame applied in examining these relationships involves a synthesis of Miles and Snow's adaptive cycle with elements central to concurrent engineering. Our results indicate that the magnitude of design change is related to differences in technology position and planning mode. To effectively implement organizational change, firms must leverage their IT platform by carefully timing IT investments in accordance with their adopted technology position. Directing the trajectory of a firm's IT platform and deploying it so as to complement the firm's technology position reduces design uncertainty, promoting reengineering success.     

Quantity Discount‐Based Inventory Coordination: Effectiveness and Critical Environmental Factors

It is understood that quantity discounts provide a practical foundation for coordinating inventory decisions in supply chains. The primary objective of this research is to test, under a variety of environmental conditions, the effectiveness of quantity discounts as an inventory coordination mechanism between a buyer and a supplier. A comprehensive simulation experiment with anova has been designed to investigate the impacts of (1) choice of quantity discount‐based inventory coordination policies, (2) magnitude of demand variation, (3) buyer's and supplier's relative inventory cost structure, and (4) buyer's economic time‐between‐orders on the effectiveness of supply chain inventory coordination. The analytical results confirm that the quantity discount policies have managerial properties as a mediator for inventory coordination. The results also show that the performance of quantity discount‐based inventory coordination policies is influenced significantly by environmental factors, such as the magnitude of demand variation, the buyer's and the supplier's inventory cost structure, and the buyer's economic time‐between‐orders.