Sequential clinical scheduling with patient no-show: The impact of pre-defined slot structures

This paper develops a sequential scheduling algorithm for consultation periods not divided into slots. Patients call a scheduler and request appointments with a specified provider. The scheduler provides the patient with an appointment time before the call terminates. In making the appointment, the scheduler cannot alter the appointments of previously scheduled patients. Service times are random and each scheduled patient has a probability of “no-showing” for the appointment. Each arriving patient generates a given amount of revenue, and costs are incurred from patient waiting and provider overtime. The scheduling method selects the calling patient's appointment time by minimizing the total expected cost. We prove that total expected cost is a convex function of appointment times and that the expected profit of the schedule is unimodal, which provides a unique stopping criterion for the scheduling algorithm. Computational studies compare this approach with no-show based sequential scheduling methods for out-patient clinics where a predefined slot structure is assumed. The new method yields higher expected profit and less overtime than when service periods are pre-divided into slots. Because slot scheduling is ingrained in healthcare, we use the model to design slot structures that account for no-show and service time variation.     

A fuzzy random continuous review inventory system

A fuzzy random continuous review system has been presented in this paper with the annual customer demand assumed to be a uniformly distributed continuous fuzzy random variable. Besides the reorder point and the production lot size, the setup cost and the ‘out of control’ probability for a production process have been assumed to be control parameters in the model. Investments to reduce the setup cost and improve the process quality have been incorporated into the total cost in this regard. A methodology has been proposed to minimize this cost and it has been illustrated by way of a numerical example.     

Multiple dimensions of power influencing knowledge integration in supply chains

This study investigates how multiple dimensions of power each facilitate knowledge integration within innovation projects in supply chains and their interrelationships. Adopting a process perspective of knowledge, we offer an alternative to much of the existing debate, which has focussed on the possession of resources. We collected data from four case-study Original Equipment Manufacturers and six associated suppliers and analysed these using Template Analysis and cross-case analysis. Our findings reveal how the power of the system, operationalized through relative performance measures, performance measurement mechanisms and the individuals in-charge of them, provides a facilitative context within which other dimensions of power operate. Here, the power of resources (expert and legitimate power), processes (associated with raising issues, cross-functional teams, early supplier involvement and reviews) and meaning (creating legitimacy through reviews) interact to support knowledge integration within innovation projects in supply chains. This, we argue, emphasises the plurality of power dimensions deployed and importance of their interrelationships in facilitating knowledge integration within hierarchical supply chain networks.     

External and internal consistency of choices made in convex time budgets

We evaluate data on choices made from convex time budgets (CTB) in Andreoni and Sprenger (Am Econ Rev 102(7):3333–3356, 2012a) and Augenblick et al. (Q J Econ 130(3):1067–1115, 2015), two influential studies that proposed and applied this experimental technique. We use the weak axiom of revealed preference (WARP) to test for external consistency relative to pairwise choice, and demand, wealth and impatience monotonicity to test for internal consistency. We find that choices made by subjects in the original Andreoni and Sprenger (Am Econ Rev 102(7):3333–3356, 2012a) paper violate WARP frequently; violations of all three internal measures of monotonicity are concentrated in subjects who take advantage of the novel feature of CTB by making interior choices. Wealth monotonicity violations are more prevalent and pronounced than either demand or impatience monotonicity violations. We substantiate the importance of our desiderata of choice consistency in examining effort allocation choices made in Augenblick et al. (Q J Econ 130(3):1067–1115, 2015), where we find considerably more demand monotonicity violations, as well as many classical monotonicity violations which are associated with time inconsistent behavior. We believe that the frequency and magnitude of WARP and monotonicity violations found in the two studies pose important confounds for interpreting and structurally estimating choice patterns elicited through CTB. We encourage researchers employing CTB in present and future experiments to include consistency tests in their design and pre-estimation analysis.     

Energy Consumption Changes and CO2 Emission in India During Reforms

As we know that energy consumption or fossil fuel consumption is very much linked with environmental pollution, which is known as global climate change, so more energy related activities have an adverse impact on environment.

The paper makes an analysis of the changes in India’s energy consumption and CO₂ emission during the reforms introduced by Govt. of India in mid 1991. The energy Input-Output Structural Decomposition Analysis (SDA) is used to identify the sources of energy consumption changes during the period 1991–92 to 1996–97. Results indicate that India’s energy consumption increased by 5.7% p.a. during the same period. Six different forces behind these changes are observed (i) technical changes, (ii) final demand structure, (iii) interaction term between technical change and final demand structure, (iv) changes in energy exports, (v) changes in energy imports, (vi) changes in energy change in stock. The empirical results show that the final demand structure, technical changes, and interaction term between final demand structure and technical changes have played important role. The findings of CO₂ emission revealed that the petroleum product and electricity are the dominating sectors, which are due to the direct effect of crude oil and coal respectively. So far as the intensities are concerned, electricity contributes a major part. The paper also suggests few policies for consideration.

     

Institutionalisation of control and accounting for bonded labour in colonial plantations: A historical analysis

This paper offers a historical analysis of control and accounting for bonded labour relations in the 19th century colonial plantations in British Ceylon. The case illustrates the institutional evolution of colonial accountability and control systems, and the forms of accounting embedded therein. The notion of historical institutionalism is used to illuminate (1) how control systems were constructed in a path-dependent manner, (2) what particular accounting practices were institutionalised and (3) what roles they played in such circumstances. As the case reports, accounting practices in this context tended to be idiosyncratic due to historically specific and path-dependent material circumstances.     

Efficiency and Equity in Funding for Government Schools in Australia

This study measures cost inefficiency for government school in New South Wales, Australia using a two‐stage data envelopment analysis (TSDEA) model and the inefficiency‐effects model (Battese & Coelli, 1995). The study found overall primary schools are 75 per cent and secondary schools are 89 per cent cost efficient. However, cost efficiency for primary schools has decreased and for secondary schools has increased marginally over the study period. The study found that social disadvantage in primary schools exerts a strong negative impact on students’ achievement scores causing inefficient use of available resources. For secondary schools no such conclusive relationship is observed.     

Comparative cheap talk

When are comparative statements credible? We show that simple complementarity conditions ensure that an expert with private information about multiple issues can credibly rank the issues for a decision maker. By restricting the expert's ability to exaggerate, multidimensional cheap talk of this form permits communication when it would not be credible in a single dimension. The communication gains can be substantial with even a couple of dimensions, and the complete ranking is asymptotically equivalent to full revelation as the number of issues becomes large. Nevertheless, partial rankings are sometimes more credible and/or more profitable for the expert than the complete ranking. Comparative cheap talk is robust to asymmetries that are not too large. Consequently, for sufficiently many independent issues, there are always some issues sufficiently symmetric to permit comparative cheap talk.     

Can International Productivity Differences Alone Account for the US Current Account Deficits?

An influential explanation for the recent rise in the US current account deficit is the boom in US productivity. As US productivity surged in the mid-1990s, capital was attracted to the US to take advantage of the higher real returns. Using a two-country general-equilibrium model, this paper quantitatively shows that the gap in productivity growth between the US and the rest of the world cannot explain the US current account deficits, especially in the 1980s and the 2000s. This is because on a GDP-weighted basis, the rest of the world actually had higher productivity growth during these periods, and standard macroeconomic models would predict an outflow of funds from the US to the rest of the world, and a consequent US current account surplus . We show that changes in global financial integration can help explain this anomaly in US current account behavior.     

Competitive procurement with ex post moral hazard

Unlike standard auctions, we show that competitive procurement may optimally limit competition or use inefficient allocation rules that award the project to a less efficient firm with positive probability. Procurement projects often involve ex post moral hazard after the competitive process is over. A procurement mechanism must combine an incentive scheme with the auction to guard against firms bidding low to win the contract and then cutting back on effort. While competition helps reduce the rent of efficient firms, it exacerbates the problem due to moral hazard. If allocative efficiency is a requirement, limiting the number of participants may be optimal. Alternatively, the same incentives can be optimally provided using inefficient allocation rules.