Testing for rational bubbles in the presence of structural breaks: Evidence from nonstationary panels

This paper presents new results on the rational bubbles hypothesis for a panel of 18 OECD countries using the model developed by Campbell (2000). We provide an analysis of international data that exploits increased power deriving from the panel unit root and cointegration methodology, together with the flexibility of allowing explicitly for multiple endogenous structural breaks in the individual series. Differently from the time series methodology, the panel data approach allows for a global analysis of the financial crashes that are related to rational bubbles. We find strong evidence in favor of bubbles phenomena.     

Which Governance Mechanisms Promote Efficiency in Reaching Poor Clients? Evidence from Rated Microfinance Institutions

This paper evaluates the effectiveness of several governance mechanisms on microfinance institutions' (MFI) performance. We first define performance as efficiency in reaching many poor clients. Following the literature on efficiency in banks, we estimate a stochastic cost frontier and measure output by the number of clients. Therefore, we capture the cost minimisation goal and the goal of serving many poor clients, both of which are pursued by MFIs. We next explore the impact of measurable governance mechanisms on the individual efficiency coefficients. The results show that efficiency increases with a board size of up to nine members and decreases after that. MFIs in which the CEO chairs the board and those with a larger proportion of insiders are less efficient. The evidence also suggests that donors' presence on the board is not beneficial. We do not find consistent evidence for the effect of competition, and we find weak evidence that MFIs in countries with mature regulatory environments reach fewer clients, while MFIs regulated by an independent banking authority are more efficient.     

Seebohm Rowntree and the postwar poverty puzzle

In his third social survey of York carried out in 1950, Seebohm Rowntree reported a steep decline since 1936 of the percentage of households in poverty. He attributed the bulk of this decline to government welfare reforms enacted during and after the war. This article re‐examines the survivingrecords from the 1950 survey, using a revised poverty line and looking more closely at the measurement of income. It also re‐assesses the impact of welfare reforms on working‐class poverty, and finds that poverty in York was significantly higher, and the contribution of welfare reform substantially less, than was originally reported.     

THE INFLUENCE OF FIRM‐ AND CEO‐SPECIFIC CHARACTERISTICS ON THE USE OF NONLINEAR DERIVATIVE INSTRUMENTS

We examine why firms use nonlinear derivatives (e.g., options). Our results suggest that option characteristics in investment opportunities and debt, the payoff structure of incentive compensation, and free cash‐flow agency problems influence the firm's choice. Investment opportunities, internally generated cash flow, business risk, and option compensation positively influence the use of nonlinear currency derivatives. Option feature in bonds positively influence the use of nonlinear interest rate derivatives, whereas bonus and stock compensation, and CEO tenure have a negative influence. In sum, nonlinear cash flow characteristics in investment opportunity, debt, and executive compensation all relate positively to nonlinear derivative usage.     

Market information and channel price structure

An analytical model is developed that considers the effect of demand information, and the precision with which demand forecasts are made, on channel profitability. Different channel price structures such as Stackelberg and Vertically integrated are considered and comparisons are made of the impact of information precision on channel profits under each structure. Other demand factors such as brand substitutability and share of base level demand are also included in the analysis, and the interaction of information and demand effects is examined. An empirical study is carried out using a sample of firms based in Hong Kong and support is found for the model propositions.     

The strategic management of re-innovation

Abstract
Most studies of the management of the technological innovation process cover the range of activities that culminate in the commercial introduction of a new product. In certain sectors of industry, however, especially those characterised by extended product lifecycles, continued competitiveness depends on vigorous and continuous product improvement, i.e. on the process of 're-innovation' to satisfy evolving user requirements. Ongoing research at SPRU has investigated the process of re-innovation in a number of industry sectors, and the paper presents material relating to two of the characteristic patterns of re-innovation identified in this research.
The first characteristic pattern is re-innovation combining the existing with the new. Two brief case studies are presented. In both cases, the manufacturer and customer gained significant benefits from this re-innovation strategy. For the manufacturer there were reduced development and testing costs, scale and learning curve benefits, distributed inventories of spares and servicing experience. For the customer there were familiarity benefits and reduced entry risks associated with proven reliability of parts and sub-systems.
The second, and more general pattern of re-innovation is based on the concept of the 'robust design'. This is a basic design which has sufficient inherent technological slack or flexibility to enable it to evolve into a significant design family of variants. Product design families offer the producer economies of scale in R&D, manufacturing, marketing and sales and servicing. They offer the user learning from experience, the enhanced possibility of user-inspired modifications, a wider range of price/ performance packages and rapid adaptations to changing environments. Robust designs can effectively combine economies of scale with economies of scope; they are strategically more flexible than leanly configured designs which satisfy only transient user requirements.