Sampling Procedures for Coordinating Stratified Samples: Methods Based on Microstrata

The aim of sampling coordination is to maximize or minimize the overlap between several samples drawn successively in a population that changes over time. Therefore, the selection of a new sample will depend on the samples previously drawn. In order to obtain a larger (or smaller) overlap of the samples than the one obtained by independent selection of samples, a dependence between the samples must be introduced. This dependence will emphasize (or limit) the number of common units in the selected samples. Several methods for coordinating stratified samples, such as the Kish & Scott method, the Cotton & Hesse method, and the Rivière method, have already been developed. Using simulations, we compare the optimality of these methods and their quality of coordination. We present six new methods based on permanent random numbers (PRNs) and microstrata. These new methods have the advantage of allowing us to choose between positive or negative coordination with each of the previous samples. Simulations are run to test the validity of each of them.     

Controlling-Schwerpunkte prozessorientierter Unternehmen

Zur Beurteilung von Prozessen werden von Unternehmen unterschiedliche Kriterien herangezogen. Die beschriebene Untersuchung zeigt u.a., dass die Kundenzufriedenheit am h?ufigsten als Beurteilungskriterium verwendet wird. Oft gebraucht werden auch Prozesskosten und die Prozesszeit.     

The political economy of public research investment and commodity policies in agriculture: an empirical study

The paper tests a political economy theory of simultaneous government decision‐making on income redistribution through commodity policies and on public research investment in agriculture. We use data from 37 countries on agricultural protection and public agricultural research expenditures (PARI). The empirical results are consistent with the political economy hypotheses. The analysis suggest that structural changes in the economy have important effects on the political incentives for governments not only to subsidize or tax farmers, but also to invest in public agricultural research. Furthermore, the analysis supports the hypotheses that the impact of such structural changes on government decision‐making on PARI is non‐linear and conditional on other factors. Regarding the impact of political institutions, the results suggest that more democracy neither leads to more distortionary transfers (agricultural protection), nor to lower investment in public goods (PARI). ©2000 Elsevier Science B.V. All rights reserved.     

Professional associations and their members: A study of the market for professional services when ability and size are independent

The members of a professional group are organized in an association which influences ability requirements and size in order to keep either the price, its own revenues or the members' incomes as high as possible. Ability is, contrary to earlier approaches, treated as a matter of education rather than selection. The members are free to set quantity and/or price in order to maximize income. The association incentive to influence size and ability is shown to depend on how demand elasticity changes with these variables. New types of misallocations such as ‘exclusive incompetence’ may emerge.     

Variable importance by partitioningR 2

One purpose of many regression studies is to compare the relative importance of the independent variables. Several different measures have been used to measure importance:t-values, standardized regression coefficients, elasticity, commonality analysis, increment inR ², correlation coefficients, hierarchical partitioning etc. Some of these measures have the common feature of partitioningR ² between the independent variables and assess their importance according to their contribution toR ². This paper is an attempt to clarify the advantages and disadvantages with these different methods and find out if any useful information can be gained by a partitioning ofR ².     

British discretion in Dutch planning: Establishing a comparative perspective for regional planning and local development in the Netherlands and the United Kingdom

Regional planning and development is continuing to take an important role in planning agendas throughout Europe. In the United Kingdom (UK), the planning system has been reformed during the last decades, marking a noticeable shift from a development-led towards a more plan-led system. In the Netherlands, strictly regulated growth-control policies have been abandoned to some degree, in favor of more decentralized planning policies featuring negotiated development. Dutch planners have been specifically interested in a more British approach, that is, a more discretionary and development-led type of approach to spatial planning. In this paper, we will discuss current efforts in Dutch regional planning to adopt new principles for planning delivery and will provide a comparative perspective between spatial planning in the UK and the Netherlands. This paper discusses the changing structure of planning delivery in both countries. At the same time, it establishes a framework for identifying critical lessons for Dutch regional planning practice as opposed to planning in the UK. Three characteristics are pivotal for the comparison: (1) the establishment of comprehensive principles for project coordination; (2) options for the settlement of planning gain, packaging interests, and regional redistribution; and (3) the institution for development-oriented planning and discretion for planning decisions. The evidence used is based on a literature review of recent debates in both countries and illustrative cases, including the Dutch ‘Heart of the Heuvelrug’ plan.     

Market power and rents in global supply chains

Market power and competition policy in food supply chains has emerged as an important economic issue in economics, and a highly sensitive item on the policy agenda. Consolidation is taking place in the food industry, both in high‐income countries and in emerging economies, but the impact of concentration in global food chains on efficiency and rent distribution is more nuanced and complex than often claimed. We review the literature and extend it by developing a model which explicitly takes into account market imperfections and contract enforcement problems in supply chains. Increased competition benefits farms by improving contract conditions, but contract enforcement becomes more complicated.     

Pricing and Capital Allocation for Multiline Insurance Firms

We study multiline insurance companies with limited liability. Insurance premiums are determined by no‐arbitrage principles. The results are developed under the realistic assumption that the losses created by insurer default are allocated among policyholders following an ex post, pro rata, sharing rule. In general, the ratio of default costs to expected claims, and thus the ratio of premiums to expected claims, vary across insurance lines. Moreover, capital and related costs are allocated across lines in proportion to each line's share of a digital default option on the insurer. Our results expand and generalize those derived elsewhere in the literature.