Comparing private and government schools in India: the devil is in the maths

Recent research shows that the gap in learning achievement between private and government schools in India can be explained away by self-selection. Analysing four rounds of panel data and distinguishing between ‘knowing’ and ‘applying’ dimensions of maths learning, I find that there is no private school advantage in the applying domain but that there is an advantage in the knowing domain.     

Self-construal and feature centrality

The current research investigates the interactive influence of self-construal and product feature centrality on product judgment tasks. Feature centrality refers to the extent to which a feature is integral to the product concept and its network of correlated features, and contributes to the coherence of the product’s conceptual representation. While the categorization literature suggests that central features (versus less central features) are weighted more when consumers make judgments about a product, across two studies we find such effect is bounded by individuals’ self-construal. In particular, whereas independent consumers, adopting an analytical thinking style, rely more on central features than less central features in product categorization and evaluations, interdependent consumers, employing a holistic thinking style, use both features to form their judgments.     

Identifying periods of market inefficiency for return predictability

The article examines the efficiency of 31 stock index series spanning 26 countries across the world, using generalized spectral test (GST) and detects departure from the martingale difference hypothesis (MDH). A moving window of 24 months was used and p-values of GST were estimated. In order to explore whether the departure from market efficiency can be used for generating profitable trades, an exponentially weighted-moving-average-based trading rule was applied and was found that average profits per trade were significantly higher when p-value of the GST was less than 0.1. These observations are in consistent with the adapted market hypothesis.     

On the existence of a stationary optimal stock for a multi-sector economy: A primal approach

Using a purely primal approach, we show the existence of a non-trivial stationary optimal stock for a multi-sector economy. Our result generalizes earlier work by dropping the δ-productivity assumption and by replacing the continuity hypothesis on the utility function by upper semicontinuity.     

Pareto optimality and competitive equilibrium in infinite horizon economies

The paper presents a general model of a decentralized economy evolving over an infinite time horizon. Alternative notions of price systems, competitive equilibria, efficiency and optimality are introduced. The main results characterize conditions under which the two fundamental theorems of welfare economics are valid in such a general framework.     

Infinite-horizon competitive programs are optimal

For infinite-horizon optimal-growth problems the standard result in the literature says that a program is optimal if and only if associated with it is a sequence of present-value prices at which the program satisfies (i) a set of myopic competitive conditions, and (ii) an asymptotic transversality condition. The principal result of this paper points out the interesting and surprising fact that at least for a class of multisector models where the production side is described by a simple linear model, and there are some limiting primary factors, the competitive conditions alone characterize an optimal program.     

Cardinal utility, utilitarianism, and a class of invariance axioms in welfare analysis

This paper examines some problems of utility measurement and interpersonal comparisons. The following theorem is first established for real-valued mappings on a set of real numbers, B: If the closure of B is an interval, then such a mapping is positive affine iff it is a first-difference preserving transformation. This theorem is used to axiomatize cardinal utility. Standard invariance axioms in social choice theory are interpreted in an alternative framework and this gives new results in axiomatizing utilitarianism. It is shown that the conflict between utilitarianism and Rawlsianism arises, in some sense, earlier than traditionally supposed.     

Are non-fundamental equilibria learnable in models of monetary policy?

Recent models of monetary policy can have indeterminacy of equilibria, which is often viewed as a difficulty of these models. We consider the significance of indeterminacy using the learning approach to expectations formation. We employ expectational stability as a selection criterion for different equilibria and derive the expectational stability and instability conditions for forward-looking multivariate models, both without and with lags. The results are applied to several monetary policies.     

US oil companies’ earnings management in response to hurricanes Katrina and Rita

This study examines earnings management by US-based oil companies in the period immediately after the impact of hurricanes Katrina and Rita. We show that large petroleum refining firms – but not the smaller crude oil and natural gas production companies – recorded significant abnormal income-decreasing accruals in the fiscal quarter immediately after the impact of hurricanes Katrina and Rita (Q4 of 2005). In addition, we show that these results are driven by abnormal current accruals. Prior studies show that some firms respond to periods of heightened political scrutiny by recording abnormal income-decreasing accruals (e.g. [Cahan, S., 1992. The effect of antitrust investigation on discretionary accruals: a refined test of the political cost hypothesis. The Accounting Review 67 (1), 77–96; Han, J., Wang, S., 1998. Political costs and earnings management of oil companies during the 1990 Persian Gulf Crisis. The Accounting Review 73 (1), 103–118]). Our results add to this stream of research by examining a political cost-increasing event that occurred after the passage of the Sarbanes–Oxley Act (SOX) of 2002. The results suggest that in the post-SOX period managers continue to engage in income-decreasing earnings management during periods of heightened political cost sensitivity, at least in the case of large petroleum refining firms.