Ordering at two length scales in comb-coil diblock copolymers consisting of only two different monomers

The microphase separated morphology of a melt of a specific class of comb-coil diblock copolymers, consisting of an AB comb block and a linear homopolymer A block, is analyzed in the weak segregation limit. On increasing the length of the homopolymer A block, the systems go through a characteristic series of structural transitions. Starting from the pure comb copolymer the first series of structures involve the short length scale followed by structures involving the large length scale. A maximum of two critical points exists. Furthermore, in the two parameter space, characterizing the comb-coil diblock copolymer molecules considered, a non-trivial bifurcation point exists beyond which the structure factor can have two maxima (two correlation hole peaks).Comment: 22 pages, 12 Postscript figures (revtex

Debreu's Coefficient of Resource Utilization, the Solow Residual and TPF: The Connection by Leontief Preferences

Debreu s coefficient of resource utilization is freed from individual data requirements.The procedure is shown to be equivalent to the imposition of Leontief preferences.The rate of growth of the modified Debreu coefficient and the Solow residual are shown to add up to TFP growth.This decomposition is the neoclassical counterpart to the frontier analytic decomposition of productivity growth into technical change and efficiency change.The terms can now be broken down by sector as well as by factor input.efficiency;productivity;growth;technological change

Aggregation of Productivity Indices: The Allocative Efficiency Correction

Industry productivity is obtained by aggregation of firm productivities and inclusion of the appropriate allocative efficiency terms, one for each firm.This paper identifies the latter correction terms.aggregation;productivity;efficiency;allocation

Bob Russell Volume: Don't Aggregate Efficiency but Disaggregate Inefficiency

aggregation;efficiency;technology

Club efficiency and Lindahl equilibrium

public goods;public choice;equilibrium analysis

Club Efficiency and Lindahl Equilibrium with Semi-Public Goods

Limit core allocations are the ones that remain in the core of a replicated economy. An equivalent notion for economies with public goods is Schweizer's club efficiency. We extend this notion to economies with goods that have a semi-public nature. The notion encompasses purely private as well as purely public club goods as polar cases. We show that given certain conditions the equivalence of club efficient allocations and Lindahl equilibria holds for a wide range of economies with semi-public club goods. We also show that extension to a more general class of economies seems implausible.clubs;club efficiency;Lindahl equilibrium;limit cores

Engines of Growth in the U.S. Economy

There is good reason to believe that R&D influences on TFP growth in other sectors are indirect.For R&D to spill over, it must first be successful in the home sector.Indeed, observed spillovers conform better to TFP growth than to R&D in the upstream sectors.Sectoral TFP growth rates are thus interrelated.Solving the intersectoral TFP equation resolves overall TFP growth into sources of growth.The solution essentially eliminates the spillovers and amounts to a novel decomposition of TFP growth.The top 10 sectors are designated engines of growt led by computers and office machinery.The results are contrasted to the standard, Domar decomposition of TFP growth.Spillovers;input-output;sources of growth

Competitive Pressure on China: Factor Rewards Migration

Our objective is to assess personal income under perfect competition, when factors are rewarded according to their productivities, and to contrast the ensuing distribution with the status quo.Competition will yield winners and losers, both in terms of factor claims and in terms of regions or provinces. Income differences will press people to migrate.To analyze this, we divide China into 30 input-output sectors and 27 provinces; we maximize domestic final demand, while preserving its proportions in each province, subject to material balances and factor constraints.The shadow prices to the constraints represent competitive commodity prices and factor rewards.Unskilled labor would stand to lose and, therefore, inequality would mount.The pressure on interprovincial migration would be enormous with 10 to 20% of the people on the road.The flipside is the great potential for improvement of the average standard of living.competition;income distribution;migration