Determinants of the adoption of sustainability assurance statements: an international investigation

This paper explores the factors associated with voluntary decisions to assure social, environmental and sustainability reports. Since the market for assurance services in this area is in its formative stages, there is a limited understanding of the demand for this emergent non‐financial auditing practice, which is evolving rapidly across different countries. Drawing from extant literature in international auditing and environmental accounting, we focus on a set of country‐level institutional factors to explain the adoption of sustainability assurance statements among an international panel of 212 Fortune Global 250 companies for the years 1999, 2002 and 2005. Consistent with our expectations, our results provide evidence that companies operating in countries that are more stakeholder oriented and have a weaker governance enforcement regime are more likely to adopt a sustainability assurance statement. Further, the demand for assurance is higher in countries where sustainable corporate practices are better enabled by market and institutional mechanisms. Our exploratory findings also indicate that the likelihood of choosing a large accounting firm as assurance provider increases for companies domiciled in countries that are shareholder oriented and have a lower level of litigation. We conclude the paper by suggesting three directions of research in the area of sustainability assurance that have relevant academic and practical implications. Copyright © 2008 John Wiley & Sons, Ltd and ERP Environment.     

INCENTIVE EFFICIENT PRICE SYSTEMS IN LARGE INSURANCE ECONOMIES WITH ADVERSE SELECTION

We decentralize incentive efficient allocations in large adverse selection economies by introducing a competitive market for mechanisms, that is, for menus of contracts. Facing a budget constraint, informed individuals purchase (lottery) tickets to enter mechanisms, whereas firms sell tickets and supply slots at mechanisms at given prices. Beyond optimization, market clearing, and rational expectations, an equilibrium requires that firms cannot favorably change, or cut, prices. An equilibrium exists and is incentive efficient. An equilibrium can be computed as the solution to a programming problem that selects the incentive efficient outcome preferred by the highest type within an appropriately defined set. For two‐types economies, this is the only equilibrium outcome.     

Elasticities of Substitution and Complementarity: A Synthesis

We derive the relationships between the net and gross elasticities of substitution and complementarity (i.e., the elasticities that refer either to the conditional or unconditional, direct or inverse demand system) in the general case of non-homothetic, variable-returns-to-scale technologies. We also show that the so-called Hicks Elasticity of Complementarity (Hicks, Oxford economic Papers 22, 289–296 (1970)) is dual to a full-fledged elasticity of gross input substitution that we call the Hotelling/Lau Elasticity of Substitution (Lau, Production Economics: A Dual Approach to Theory and Applications. Amsterdam: North-Holand (1978)). The former is, in fact, the proper elasticity of substitution in the case of the inverse, unconditional input demand. Our results should clarify some issues about the input substitutability classification.     

The co-evolution of innovation,demand and growth

In order to explain long-run economic development, we analyse in this paper the interplay between supply-side and demand-side processes. On the supply side, three different innovation processes are observed and interact: (i) growing productive efficiency, (ii) the emergence of new sectors and (iii) the increasing quality and differentiation of existing products. On the demand side, we analyse the meaning of disposable income and varying preference systems. The analysis is undertaken with the help of a numerical model of economic growth by the emergence of new industries. Our results show that the time path of economic development which we observe could not have been generated by taking into account a supply-side-based view on innovations alone. Without making reference to the formation of an adequate demand, development processes cannot be explained. The three processes need to be combined because each one individually would not suffice to generate long-run economic development. However, only with the formation of an adequate demand long-run economic development becomes sustainable.     

Developing marketing capabilities for customer value creation through Marketing-Sales integration

The capacity to create superior customer value stems from the marketing capabilities a company possesses. A considerable body of research has indicated that market oriented companies have distinctive marketing capabilities which lead to superior organizational performance. Although it has been widely recognized that the development of marketing capabilities requires the joint effort of Marketing and Sales departments, almost no attention has been devoted to investigating the integration of these two functions. This study reports on an exploratory effort to use the means-end theory in explaining Marketing-Sales integration. Findings show that Marketing-Sales integration is a multi-faceted construct made up of different components that impact different marketing capabilities and highlight its antecedents and consequences.     

Local volatility under rough volatility

Several asymptotic results for the implied volatility generated by a rough volatility model have been obtained in recent years (notably in the small-maturity regime), providing a better understanding of the shapes of the volatility surface induced by rough volatility models, supporting their calibration power to SP500 option data. Rough volatility models also generate a local volatility surface, via the so-called Markovian projection of the stochastic volatility. We complement the existing results on implied volatility by studying the asymptotic behavior of the local volatility surface generated by a class of rough stochastic volatility models, encompassing the rough Bergomi model. Notably, we observe that the celebrated “1/2 skew rule” linking the short-term at-the-money skew of the implied volatility to the short-term at-the-money skew of the local volatility, a consequence of the celebrated “harmonic mean formula” of [Berestycki et al. (2002). Quantitative Finance, 2, 61–69], is replaced by a new rule: the ratio of the at-the-money implied and local volatility skews tends to the constant $1/(H+3/2)$ (as opposed to the constant 1/2), where H is the regularity index of the underlying instantaneous volatility process.