Nonmolecular nature of nitric-oxide-inhibited thermal decomposition of n-butane

The thermal decomposition of most organic molecules is generally accepted to occur at least in part via a free radical chain process. Since Hinshelwood and Staveley (1) discovered that small additions of nitric oxide reduced the rate of thermal decomposition, there has been much controversy (2) concerning the nature of the “residual” reaction remaining after further additions of inhibitor produce no further decrease in rate. Jach, Stubbs, and Hinshelwood (3) have shown this limiting rate to be independent of the inhibitor used and attribute this residual reaction to a nonchain molecular process in which the parent molecule breaks up, in a single step, into stable products

Total Economic Values of Increasing Gray Whale Populations: Results from a Contingent Valuation Survey of Visitors and Households

The consistency of an individual's willingness to pay (WTP) responses for increases in the quantity of an environmental public good (whale populations) is tested along three lines. First, we test whether WTP for 50% and 100% increases in whale populations are statistically different from zero. Second, we ask whether the incremental WTP from a 50% increase to a 100% increase is statistically significant. Finally, we test whether there is diminishing marginal valuation of the second 50% increment in gray whale populations. The paired t-tests on open-ended WTP responses supported all three sets of hypotheses. Both visitors and households provided WTP responses that were statistically different from zero and increased (but in a diminishing fashion) for the second increment in WTP. In this survey both visitors and households provided estimates of total economic value (including non-use or existence values) for large changes in wildlife/fishery resources that were consistent with consumer theory.Existence value, contingent valuation, gray whale, California, willingness to pay, Environmental Economics and Policy, Resource /Energy Economics and Policy,

Resource management and the effects of trade on vulnerable places and people : lessons from six case studies

Lessons from six case studies illustrate the complex relationships between international trade, vulnerable ecologies and the poor. The studies, taken from Africa, Asia and Latin America and conducted by local researchers, are set in places where the poor live in close proximity to ecologies that are important to global conservation efforts, and focus on the cascading consequences of trade policy for local livelihoods and environmental services. Collectively, the studies show how under-valued common resources are often poorly protected and consequently subject to shifting economic incentives, including those that arise from trade. The studies provide examples where trade works to accelerate the use of natural resources and to exacerbate unsustainable dependencies by the poor, and other examples where trade has the opposite effect. An important conclusion is that local livelihood and technology choices have important consequences for how environmental resources are used and should be taken into account when designing policies to safeguard fragile ecologies.Environmental Economics&Policies,Economic Theory&Research,Emerging Markets,Labor Policies,Population Policies

TESTING SIGNIFICANCE OF MULTI-DESTINATION AND MULTI-PURPOSE TRIP EFFECTS IN A TRAVEL COST METHOD DEMAND MODEL FOR WHALE WATCHING TRIPS

Inclusion of multi-destination and multi-purpose visitors has an appreciable influence on a standard count data travel cost model derived estimate of willingness to pay but the differences are not statistically significant. We adapt a more general travel cost model (TCM) of Parsons and Wilson (1997) that allows for inclusion of multi-destination visitors as incidental demand to allow estimation of an unbiased measure of single and multi-destination willingness to pat for whale viewing using a single pooled equation. The primary purpose trip values from the standard TCM and simple generalized TCM model are identical at $43 per person per day and neither are significantly different from the$50 day value from a generalized model that distinguishes between joint and incidental trips. The general models avoid underestimation of total recreation site benefits that would result from omitting the consumer surplus of multi-destination visitors.Resource /Energy Economics and Policy,

Commodity market reform in Africa : some recent experience

Since the early 1980s, dramatic changes in export commodity markets, shocks associated with resulting price declines, and changing views on the role of the state have ushered in widespread reforms to agricultural commodity markets in Africa. The reforms significantly reduced government participation in the marketing and pricing of commodities. Akiyama, Baffes, Larson, and Varangis examine the background, causes, process, and consequences of these reforms and derive lessons for successful reforms from experiences in markets for four commodities important to Africa-cocoa, coffee, cotton, and sugar. The authors'commodity focus highlights the special features associated with these markets that affect the reform process. They complement the current literature on market reforms in Africa, where grain-market studies are more common. The authors suggest that the types of market interventions prior to reform are more easily classified by crop than by country. Consequently, there are significant commodity-specific differences in the initial conditions and in the outcomes of reforms related to these markets. But there are general lessons as well. The authors find that the key consequences of reform have been significant changes in or emergence of marketing institutions and a significant shift of political and economic power from the public to the private sector. In cases where interventions were greatest and reforms most complete, producers have benefited from receiving a larger share of export prices. Additionally, the authors conclude that the adjustment costs of reform can be reduced in most cases by better understanding the detailed and idiosyncratic relationships between the commodity subsector, private markets, and public services. Finally, while there are significant costs to market-dependent reforms, experiences suggest that they are a necessary step toward a dynamic commodity sector based on private initiative. This is particularly true in countries and sectors where interventions were greatest and market-supporting institutions the weakest.Economic Theory&Research,Enterprise Development&Reform,Environmental Economics&Policies,Labor Policies,Markets and Market Access,Environmental Economics&Policies,Access to Markets,Markets and Market Access,Economic Theory&Research,Crops&Crop Management Systems

The equality of 3-manifold invariants

The invariants of 3-manifolds defined by Kuperberg for involutory Hopf algebras and those defined by the authors for spherical Hopf algebras are the same for Hopf algebras on which they are both defined.Comment: 8 pages, definition of state sum invariant improved for clarity, plus minor typos corrected. With 3 postscript figures. further change: BoxedEPSF macro now include

Race and Representation in Congress: The Color of Constituencies

The topic of race, redistricting, and minority representation in Congress has emerged as one of the most salient issues in contemporary political thought. The creation of so‑called majority minority districts has been attacked as unfair and racially polarizing by some observers and ultimately struck down as unconstitutional by the Supreme Court. The study of race in relation to American politics and institutions, and, in particular, to the institution of Congress, has produced a wealth of research and literature in recent years. This scope of budding research ranges from legislative activity and Congressional voting to the electoral process and campaigning. This study examines the effects of race in Congressional elections and campaigning, and will be primarily focused on constituent relationships with members of the House of Representatives. Through this research, a better understanding of the differences in constituent relationships and engagement between African American House members and their Caucasian colleagues will be reached. Based on the current literature and prevailing scholarly attitudes, one could likely conclude that African American Congress members, on the whole, develop closer and more personal relationships with their constituents than do white representatives