On the performance of endogenous access pricing

Endogenous access pricing (ENAP) is an alternative to the traditional procedure of setting a fixed access price that reflects the regulator’s estimate of the supplier’s average cost of providing access. Under ENAP, the access price reflects the supplier’s actual average cost of providing access, which varies with realized industry output. We show that in addition to eliminating the need to estimate industry output accurately and avoiding a divergence between upstream revenues and costs, ENAP can enhance the incentive of a vertically integrated producer to minimize its upstream operating cost. However, ENAP can sometimes discourage surplus-enhancing investment.     

Out-of-Pocket Health Expenditure: Impact on the Consumption of Indian Households

This paper examines whether out-of-pocket health expenditure affects the composition of household consumption. Based on Indian data, conditional Engel curves for 10 broad categories of goods and services, namely food, intoxicants, fuel, clothing and footwear, education, entertainment, travel, rent, durables and other goods have been estimated. Conditional Engel curves show whether the share of a particular good is increased or decreased in household consumption due to health expenditure. The findings suggest that poor households decrease the share of clothing and education and increase the share of food, fuel and travel. It has also been found that households from less developed states and from states with lower public health expenditure were more affected.     

On the value of participation: endogenous emergence of social norms in a three-player ultimatum game experiment

We report results from two different settings of a three-player ultimatum game. Under the “Monocratic” rule, a player is randomly selected to make an offer to two receivers. Under the “Democratic” rule, all three players make a proposal, and one proposal is then randomly selected. A majority vote is required to implement the proposal in either setting. Although the two rules are strategically equivalent, different patterns of behaviour emerge as the number of interactions increase. Under the “Monocratic” rule, proposers seem to be entitled to claim a larger share of the pie, and receivers are more likely to accept, than in the “Democratic” rule. We speculate that institutions allowing more participation in the process of collective choice lead to a more socially responsible behaviour in individuals.     

SOCIAL ACCOUNTING MATRIX FOR INDIA

This paper provides the latest Social Accounting Matrix (SAM) of the year 2003–2004 for the Indian economy with a wide variety of disaggregation for the Energy sector and the sectors that are relevant for environmental and climate policy evaluation. This SAM shows the interaction between production, income, consumption and capital accumulation. It can be used to provide an analysis of the interrelationship between the production structure of an economy and the distribution of incomes and expenditures of different household groups. In addition, it can be used for multiplier analysis to capture direct, indirect and induced impact on input use due to any exogenous changes in the economy. This SAM consists of 85 sectors of the economy, three factors of production and nine categories of occupational households. The Indian economy is becoming structurally biased towards capital intensive sectors, such as service and energy production. The energy production sector itself is the most energy intensive sector as of 2003–2004.     

An EM algorithm for the destructive COM-Poisson regression cure rate model

In this paper, we consider a competitive scenario and assume the initial number of competing causes to undergo a destruction after an initial treatment. This brings in a more realistic and practical interpretation of the biological mechanism of the occurrence of tumor since what is recorded is only from the undamaged portion of the original number of competing causes. Instead of assuming any particular distribution for the competing cause, we assume the competing cause to follow a Conway–Maxwell Poisson distribution which brings in flexibility as it can handle both over-dispersion and under-dispersion that we usually encounter in count data. Under this setup and assuming a Weibull distribution to model the time-to-event, we develop the expectation maximization algorithm for such a flexible destructive cure rate model. An extensive simulation study is carried out to demonstrate the performance of the proposed estimation method. Finally, a melanoma data is analyzed for illustrative purpose.     

Will a matchmaker invite her potential rival in?

This paper analyzes optimal strategies of an incumbent intermediary, who matches agents on the two sides of a market, in the presence of entry threat under alternative scenarios. It shows that, when entry is free, strategic entry accommodation is the optimal choice of the incumbent—not entry deterrence, unless the variation in agents' types is small. Entry accommodation remains optimal for the incumbent for a wide range of parametric configurations even when there is a fixed cost of entry. These results are in sharp contrast to the predictions of existing models of entry.     

Real-world dosing and drug costs with everolimus or axitinib as second targeted therapies for advanced renal cell carcinoma: a retrospective chart review in the US

Objective:

To describe dosing patterns and to compare the drug costs per month spent in progression-free survival (PFS) among patients with advanced renal cell carcinoma (aRCC) treated with everolimus or axitinib following a first tyrosine kinase inhibitor (TKI).

Methods:

A medical record retrospective review was conducted among medical oncologists and hematologists/oncologists in the US. Patient eligibility criteria included: (1) age ≥18 years; (2) discontinuation of first TKI (sunitinib, sorafenib, or pazopanib) for medical reasons; (3) initiation of axitinib or everolimus as a second targeted therapy during February 2012–January 2013. Real-world dosing patterns were summarized. Dose-specific drug costs (as of October 2014) were based on wholesale acquisition costs from RED BOOK Online. PFS was compared between everolimus and axitinib using a multivariable Cox proportion hazards model. Everolimus and axitinib drug costs per month of PFS were compared using multivariable gamma regression models.

Results:

A total of 325 patients received everolimus and 127 patients received axitinib as second targeted therapy. Higher proportions of patients treated with axitinib vs everolimus started on a higher than label-recommended starting dose (14% vs 2%) or experienced dose escalation (11% vs 1%) on second targeted therapy. The PFS did not differ significantly between patients receiving everolimus or axitinib (adjusted hazard ratio (HR)?=?1.16; 95% confidence interval [CI]?=?0.73–1.82). After baseline characteristics adjustment, axitinib was associated with 17% ($1830) higher drug costs per month of PFS compared to everolimus ($12,467 vs $10,637; p?<?0.001).

Limitations:

Retrospective observational study design and only drug acquisition costs considered in drug costs estimates.

Conclusions:

Patients with aRCC receiving axitinib as second targeted therapy were more likely to initiate at a higher than label-recommended dose and were more likely to dose escalate than patients receiving everolimus. With similar observed durations of PFS, drug costs were significantly higher—by 17% per month of PFS—with axitinib than with everolimus.     

A limited-dependent analysis of the choice of regular labour contract in seasonal agriculture

The paper examines both theoretically and empirically the factors determining the demand for regular labour in seasonal agriculture. In an implicit contract framework it is argued that there are ‘hoarding costs’ of regular labour in the slack period when there is not much work to be done. Consequently, the number of regular labour employed is constrained by the hoarding cost where larger employment-intensive farms tend to hire more regular labour. Evidence from the ICRISAT villages in India, too, show that though the marginal costs of regular labour are zero, there are significant hoarding costs of regular labour among small farms so that larger farmers are the major demanders of regular labour. Estimates of the double-hurdle model jointly determining the probability of hiring regular labour and demand for regular labour-hours (if a regular labour is hired) are shown to be an improvement over univariate tobit estimates of the demand for regular labour-hours only.     

Union-oligopoly bargaining and entry deterrence: a reassessment of limit pricing

This paper introduces wage bargaining in the framework of Milgrom and Roberts (Econometrica 50(2):443–459, 1982) where the workers’ reservation wage is the private information parameter critical for entry. We show that entry threat significantly distorts the wage, which in some cases adversely affects the firm’s ability to signal through price. Consequently, the separating equilibrium (in price) does not always exist. If, however, wage agreements are made public, signalling occurs with or without distortions in wage depending on whether the union’s bargaining power is high or low. Pooling equilibrium also exists and it features similar distortions. We also examine which signal, wage or price, generates greater social welfare. We would like to thank two referees for their helpful comments and suggestions. This paper is partially based on a chapter of Pal’s PhD thesis done at Indira Gandhi Institute of Development Research (IGIDR), India. For remaining errors we are solely responsible.     

Determinants of occupational change and mobility in rural India

With a view to redress the dearth of economic analysis on occupational dynamics in rural household economies, this study examines the nature and characteristics of occupational change and mobility in rural India. Using the unique WIDER data-set from six villages in West Bengal, India the factors causing a change of primary occupation among those who tried to change occupation over a twelve-month recall period has been analysed. Bivariate probit estimates jointly determining the probability of trying to change occupation and having been successful suggest that success in changing occupation depends crucially on socially constructed ‘status’- being older, male, from larger farming families or having higher schooling experience. They also exemplify the effects of regional diversity, levels of prosperity and different patterns of employment between agricultural and non-agricultural activities.