networking off madison avenue known for the key role that networking plays in the operation of agencies where interviews suggest that informal networking among close neighbors is critical to many agencies success networking involves the exchange of ideas and while there is no market place for these ideas exchanges may be more deliberate rather than just marshall s 1890 mysteries of the air type of information spillovers this paper examines the effect on productivity of having more near advertising agency neighborhoods and hence better opportunities for meetings and exchange within manhattan we will show that there is extremely rapid spatial decay in the benefits of having more near neighbors even in the close quarters of southern manhattan a finding that is new to the empirical literature and indicates our understanding of scale externalities is still very limited the finding indicates that having a high density of commercial establishments is important in enhancing local productivity an issue in lucas and rossi hansberg 2002 where within business district spatial decay of spillovers plays a key role we will argue also that in manhattan advertising agencies trade off the higher rent costs of being in bigger clusters nearer centers of action against the lower rent costs of operating on the fringes away from high concentrations of other agencies introducing the idea of trade offs immediately suggests heterogeneity is involved we will show that higher quality agencies are the ones willing to pay more rent to locate in greater size clusters specifically because they benefit more from networking while all 1 the research in this paper was conducted while the authors were census bureau research associates at the boston research data center research results and conclusions expressed are those of the authors and do not necessarily indicate concurrence by the census bureau the paper has been screened to ensure that no confidential data are revealed we acknowledge helpful comments from andrew foster on aspects of the paper and from participants in seminars at brown university lse and the university of toronto

localization economies vertical organization and trade this paper develops a model of regional production networks based on localization economies i consider an industry with two activities one with location specific external economies the other with constant returns under autarky localization economies imply the formation of an industry center agglomeration drives up wages in the center causing the constant returns activity to disperse to outlying regions trade recreates the regional production network on a global scale i apply the model to data from the mexican apparel industry estimation results on mexico s pre and post trade regional apparel wage structure are consistent with localization economies implications for the north american free trade agreement nafta are discussed this abstract was borrowed from another version of this item

energy savings in nigeria is there a way of escape from energy inefficiency abstract this study estimates the transition probabilities for different energy use states in nigeria using the markov switching regression technique according to the results both energy efficient and energy inefficient states are less persistent but comparatively the energy inefficient state is more persistent thus in nigeria it is much difficult to escape from the energy inefficient state than the energy efficient state several reasons may explain this phenomenon and they include inefficient regulatory system poor institutional structure high corruption proliferation of second hand goods undeveloped markets high incidence of poverty and inefficient pricing in the energy sector pricing policies should be combined with institutional improvement and infrastructural development if nigeria wants to achieve a sustainable energy efficient state in the long term

productivity gains from geographic concentration of human capital evidence from the cities abstract based on recent theoretical developments the argument is made that the average level of human capital is a local public good cities with higher average levels of human capital should therefore have higher wages and higher land rents after conditioning on the characteristics of individual workers and dwellings this prediction is supported by data for standard metropolitan statistical areas smsas in the united states where the smsa average levels of formal education and work experience are used as proxies for the average level of human capital the alternative explanations of omitted smsa variables and self selection are evaluated an estimate of the effect of an additional year of average education on total factor productivity is computed

determinants of energy efficiency investments in the us this paper analyses decisions on energy efficiency ee investments by small and medium manufacturing enterprises in the us which have received assessment from the department of energy doe the results confirm the importance of payback time and investment costs as the main determining factors in deciding whether to invest in energy efficiency such investment recommendations are frequently not implemented even though they apparently entail major advantages and give rise to considerable energy savings the data show results which are compatible with a series of elementary valuation processes limited to availability of information far removed from other more academically ambitious methods such as net present value npv and the real options ro method the paper analyses the impact of the primary resource streams electricity natural gas other energy waste and others physical situation of firms in line with their geographical locations in different us states and changes over time from 1984 to 2009 ee investment decisions are analysed here using probit models whose parameters are calibrated on the basis of the information held in the industrial assessment centres iac database the results suggest various ideas to improve policies for promoting investment in ee specially the iac programme

war migration and the origins of the thai sex industry this paper analyzes the determinants behind the spatial distribution of the sex industry in thailand we relate the development of the sex industry to an early temporary demand shock i e u s military presence during the vietnam war comparing the surroundings of thai military bases used by the u s army to districts close to unused thai bases we find that there are currently 5 times more commercial sex workers in districts near former u s bases the development of the sex industry is also explained by a high price elasticity of supply due to female migration from regions affected by an agricultural crisis finally we study a consequence induced by the large numbers of sex workers in few red light districts the hiv outbreak in the early 1990s

the economics of density evidence from the berlin wall this paper develops a quantitative model of internal city structure that features agglomeration and dispersion forces and an arbitrary number of heterogeneous city blocks the model remains tractable and amenable to empirical analysis because of stochastic shocks to commuting decisions which yield a gravity equation for commuting flows to structurally estimate agglomeration and dispersion forces we use data on thousands of city blocks in berlin for 1936 1986 and 2006 and exogenous variation from the city s division and reunification we estimate substantial and highly localized production and residential externalities we show that the model with the estimated agglomeration parameters can account both qualitatively and quantitatively for the observed changes in city structure we show how our quantitative framework can be used to undertake counterfactuals for changes in the organization of economic activity within cities in response for example to changes in the transport network

urban growth and transportation we estimate the effects of interstate highways on the growth of u s cities between 1983 and 2003 we find that a 10 increase in a city s initial stock of highways causes about a 1 5 increase in its employment over this 20 year period to estimate a structural model of urban growth and transportation we rely on an instrumental variables estimation that uses a 1947 plan of the interstate highway system an 1898 map of railroads and maps of the early explorations of the u s as instruments for 1983 highways we investigate the role of interstate highways in the growth of u s cities our investigation is in three parts in the first we develop a simple structural model describing the joint evolution of highways and employment in cities in the second we develop an instrumental variables strategy that allows us to identify key parameters of our structural model we are also able to provide out of sample evidence for the validity of our estimates and for the central assumptions of our model in the third we use our estimates to assess counterfactual transportation policies we find that a 10 increase in a city s stock of interstate highways causes about a 1 5 increase in its employment over 20 years and that an additional kilometre of highway allocated to a city at random is associated with a larger increase in employment or population than is a road assigned to a city by the prevailing political process our results also suggest that too many new highways were built between 1983 and 2003 these findings are important for three reasons first transportation generally and infrastruc ture in particular are large segments of the economy the median u s household devotes about 18 of its income to road transportation while all levels of government together spend another 200 billion dollars annually overall the value of capital stock associated with road transporta tion in the u s tops 5 trillion dollars united states bureau of transportation statistics 2007 2010 given the magnitude of transportation expenditures it is important that the impact of these expenditures on economic growth be carefully evaluated and not assessed on the basis of the claims of advocacy groups our analysis provides a basis for assessing whether these resources are well allocated our results also provide useful guidance to policy makers charged with planning cities since changes in a city s transportation infrastructure cause changes to the city s employment new transportation infrastructure causes complementary changes in the demand for public utilities and schools our results provide a basis for estimating the magnitude of such changes finally this research is important to furthering our understanding of how cities operate and grow transportation costs are among the most fundamental quantities in theoretical models

valuing rail access using transport innovations this paper uses a powerful empirical method to evaluate the benefits of rail access to consumers we study the effects on house prices of a transport innovation that altered the distance to the nearest station for some households but left others unaffected the transport innovation we study is the construction of new stations in london in the late 1990s using this innovation we implement a quasi experimental approach that allows us to avoid the biases inherent in cross sectional valuation work our evidence on distance station effects on local prices identified through distance changes induced by the transport innovation suggests that households value rail access and that these valuations are large compared to the valuations of other local amenities

implied discount rate and payback threshold of energy efficiency investment in the industrial sector the industrial sector is responsible for about a third of the energy usage in the united states and there is significant energy saving potential from the industrial sector however the phenomenon of energy efficiency gap the scenario in which cost effective energy efficient technologies enjoy only limited market success appears frequently in the industrial sector this article tries to explain this efficiency gap in the industrial sector by empirically estimating the implied discount rates and payback thresholds industrial firms use to evaluate their energy efficiency investments using the industrial assessment centers iac database from 2002 to 2011 with more than 30 000 energy efficiency recommendations this article builds structural models of firms evaluation of an energy efficiency project the model results show that the implied discount rates of medium to small industrial firms range from 40 to 45 and the average payback threshold is about 9 months

local economic development agglomeration economies and the big push 100 years of evidence from the tennessee valley authority we study the long run eects of one of the most ambitious place based economic development policies in u s history the tennessee valley authority using a rich panel dataset of counties we conduct an evaluation of the dynamic eects of the tva on local economies in the seventy years following the program s inception we nd that the tva led to short run gains in agricultural employment that were eventually reversed while impacts on manufacturing employment continued to intensify well after the program s subsidies had lapsed a pattern consistent with the presence of strong agglomeration economies in the manufacturing sector economists have long cautioned that the local gains created by place based policies may be oset by losses elsewhere yielding ambiguous eects on the u s as a whole building on the framework in glaeser and gottlieb 2008 we develop a novel approach to assessing the aggregate consequences of shifting the spatial distribution of manufacturing employment our ndings suggest the aggregate productivity gains associated with relocating manufacturing activity to the tva region were probably minimal

agglomeration and land rents evidence from the prefectures abstract we use japanese prefectural wage and land rent data to estimate the magnitude of agglomeration effects in manufacturing and financial services we also examine the geographical range of agglomeration effects by estimating the extent to which they diminish with distance using a specification that encompasses the polar cases of purely local agglomeration economies on the one hand and national increasing returns on the other we find that the extent of agglomeration economies in both industries is significant but that their effect decays much faster with distance in financial services than in manufacturing that is the geographical reach of spillovers in financial services appears to be much lower than in manufacturing

congestion agglomeration and the structure of cities abstract congestion costs in urban areas are significant and clearly represent a negative externality nonetheless economists also recognize the production advantages of urban density in the form of positive agglomeration externalities the long run equilibrium outcomes in economies with multiple correlated but offsetting externalities have yet to be fully explored in the literature therefore i develop a spatial equilibrium model of urban structure that includes both congestion costs and agglomeration externalities i then estimate the structural parameters of the model using a computational algorithm to match the spatial distribution of employment population land use land rents and commute times in the data policy simulations based on the estimates suggest that congestion pricing may have ambiguous consequences for economic welfare

tarnishing the golden and empire states land use restrictions and the u s economic slowdown abstract this paper studies the impact of state level land use restrictions on u s economic activity focusing on how these restrictions have depressed macroeconomic activity since 2000 we use a variety of state level data sources together with a general equilibrium spatial model of the united states to systematically construct a panel dataset of state level land use restrictions between 1950 and 2014 we show that these restrictions have generally tightened over time particularly in california and new york we use the model to analyze how these restrictions affect economic activity and the allocation of workers and capital across states counterfactual experiments show that deregulating existing urban land from 2014 regulation levels back to 1980 levels would have increased us gdp and productivity roughly to their current trend levels california new york and the mid atlantic region expand the most in these counterfactuals drawing population out of the south and the rustbelt general equilibrium effects particularly the reallocation of capital across states account for much of these gains

the determination of unemployment benefits while much empirical research exists on labor market consequences of unemployment benefits there is remarkably little evidence on the forces determining benefits we present a simple model where workers desire insurance against unemployment risk and benefits increase the unemployment rate we then conduct one of the first empirical analyses of the determinants of the parameters of the benefit system using data for developed countries for 1971 89 controlling for year and country fixed effects and the government s political color we find evidence that the level of benefits falls when the unemployment rate is high this is consistent with wright s tax effect

the relationship between enterprise efficiency in resource use and energy efficiency practices adoption abstract the purpose of this paper is to investigate the relationship between enterprise efficiency in resource use and the adoption of energy efficiency practices recommended by the us department of energy doe through the industrial assessment center iac using non parametric techniques such as data envelopment analysis dea and parametric techniques like stochastic frontier analysis sfa and corrected ordinary least square cols to measure the efficiency the regression quantile rq is carried out to test the hypothesis that the most efficient companies have adopted a higher level of practice the main conclusion is that when the enterprise operates at increasing returns to scale rts the impact of efficiency on adoption increases positively inversely when the enterprise operates at decreasing rts the impact of efficiency on adoption increases negatively

wages rents and the quality of life this study focuses on the role of wages and rents in allocating workers to locations with various quantities of amenities the theory demonstrates that if the amenity is also productive then the sign of the wage gradient is unclear while the rent gradient is positive the theory is extended to include the housing market and nontraded goods these extensions require little modification of the conclusion the empirical work on wages shows that the regional wage differences can be explained largely by these local attributes with the use of site price data implicit prices are estimated and quality of life rankings for the cities are computed

spatial wage disparities sorting matters spatial wage disparities can result from spatial differences in the skill composition of the workforce in non human endowments and in local interactions to distinguish between these explanations we estimate a model of wage determination across local labour markets using a very large panel of french workers we control for worker characteristics worker fixed effects industry fixed effects and the characteristics of the local labour market our findings suggest that individual skills account for a large fraction of existing spatial wage disparities with strong evidence of spatial sorting by skills interaction effects are mostly driven by the local density of employment not controlling for worker heterogeneity leads to very biased estimates of interaction effects endowments only appear to play a small role

energy saving implications from supply chain improvement an exploratory study on china s consumer goods retail system abstract despite significant public attentions to green supply chain management few studies have explicitly addressed the energy implications of consumer goods supply surplus especially in developing countries like china this study explored the energy saving potential from improving supply chain efficiencies and reducing excess inventory in china s retail system from a life cycle perspective through embodied energy analysis we found that energy invested pre manufacture contributed 80 95 of the total energy embodied in consumer products although embodied energy intensities had declined by 60 90 since the mid 1990s the lessened marginal improvements implied that low hanging fruits have largely been captured and the search for new opportunities for energy saving is in demand positive correlations between total economic inputs and embodied energy in consumer goods indicated possible synergy effect between cost reduction and energy saving in supply system management and structural path analysis identified sector specific energy management priorities for each retail related sector this study suggested that improving supply chain efficiencies provides a promising supplement to china s current industrial energy efficient projects which target reducing direct energy use per se as an intra firm cost saving measure from the life cycle perspective the definition of green sector might have to be reconsidered in china towards a more energy efficient economy and society

energy efficiency economics and policy energy efficiency and conservation are major factors in the reduction of the environmental impact of the energy sector particularly with regard to climate change energy efficiency also contributes to reducing external dependence and vulnerabilities in the energy domain in this paper we discuss the factors that influence energy efficiency and conservation decisions and the most appropriate policies for their promotion although not all public policies seem justified we argue that specific policies for promoting energy conservation may be required preferably based on economic instruments or on the provision of information to consumers

the attenuation of human capital spillovers abstract this paper uses 2000 census data to estimate the relationship of agglomeration and proximity to human capital to wages the paper takes a geographic approach and focuses on the attenuation of agglomeration and human capital effects differencing and instrumental variable methods are employed to address endogeneity in the wage agglomeration relationship and also to deal with measurement error in our agglomeration and human capital variables three key results are obtained first the spatial concentration of employment within five miles is positively related to wage second the benefits of spatial concentration are driven by proximity to college educated workers an instance of human capital spillovers third these effects attenuate sharply with distance

income maximization and the selection and sorting of international migrants abstract two prominent features of international labor movements are that the more educated are more likely to emigrate positive selection and more educated migrants are more likely to settle in destination countries with high rewards to skill positive sorting using data on emigrant stocks by schooling level and source country in oecd destinations we find that a simple model of income maximization can account for both phenomena results on selection show that migrants for a source destination pair are more educated relative to non migrants the larger is the absolute skill related difference in earnings between the destination country and the source results on sorting indicate that the relative stock of more educated migrants in a destination is increasing in the absolute earnings difference between high and low skilled workers we use our framework to compare alternative specifications of international migration estimate the magnitude of migration costs by source destination pair and assess the contribution of wage differences to how migrants sort themselves across destination countries

the determinants and welfare implications of us workers diverging location choices by skill 1980 2000 abstract from 1980 to 2000 the rise in the us college high school graduate wage gap coincided with increased geographic sorting as college graduates concentrated in high wage high rent cities this paper estimates a structural spatial equilibrium model to determine causes and welfare consequences of this increased skill sorting while local labor demand changes fundamentally caused the increased skill sorting it was further fueled by endogenous increases in amenities within higher skill cities changes in cities wages rents and endogenous amenities increased inequality between high school and college graduates by more than suggested by the increase in the college wage gap alone jel d31 i26 j24 j31 j61 r23

a review of optimal energy policy instruments on industrial energy efficiency programs rebound effects and government policies abstract industrial energy efficiency programs ieeps are defined as one of the most popular government policies that aim to reduce energy consumption in industrial energy intensive sectors in this paper we review and classify the most important academic studies that have addressed the environmental and economic aspects of ieeps using a systematic review the classification of energy policy instruments has been developed based on an analytical approach we discuss also the outputs benefits and barriers of ieeps besides a comprehensive argument about the restrictive policies on the rebound effects made after the implementation of these programs the results disclose that china usa and sweden are the most addressed countries on ieeps and their applications in this regard incentive energy policies e g voluntary agreements and subsidies have been applied more than others in the last decade furthermore most of the reviewed studies emphasize energy price reform as an effective practical policy while a few analytical methods can be seen to help policy makers determine the optimal levels of decision variables finally according to the state of the art analysis the authors provide some novel recommendations to improve the performance of ieeps using some restrictive policies on the negative impacts of rebound effects

analysis of tax incentives for energy efficient durables in the eu climate change is one of the most significant challenges faced by societies this century energy consumption is directly associated with co2 emissions and climate change the european commission has set out emission reduction targets that require a great deal of energy consumption savings in the next 10 years in european countries this paper presents the results of an analysis of the potential cost effectiveness of different policy options aimed to foster the production and consumption of energy efficient appliances in different european countries our results suggest that incentives to promote the use of energy efficient appliances can be cost effective but whether or not they are depends on the particular country and the options under consideration from the cases considered tax credits on boilers appear to be a cost effective option in denmark and italy while subsidies on cfli bulbs in france and poland are cost effective in terms of ton of co2 abated comparing the subsidies against the energy tax options we find that the subsidies are in most cases less cost effective than the energy tax

intra urban wage variation employment location and commuting times abstract theory predicts that within a metropolitan area employers located where there is difficult commuting will have to compensate their workers with appropriately higher wages this should hold whether one is comparing central city work locations with those at the fringe or simply differences between suburban edge cities in the longer run if employers are concerned primarily with labor costs firm mobility should equalize wages or else agglomeration economies must exist to sustain the differences using microdata from the 1990 census for 2 large metropolitan areas in the u s wage equations are estimated for urban workers allowing for different wage levels depending on zone of employment the results show that observationally equivalent workers have wages that vary substantially across employment zones within a metro area and that this variation is strongly and significantly correlated with the average commute time of the workers employed in that zone these results hold across several different econometric specifications wages and average travel times also are found to be highly correlated with the aggregate number of workers in each zone but are not affected by zone employment specialization thus there is inconclusive evidence as to whether wage commuting cost differences result from equilibrium agglomeration effects or from a disequilibrium distribution of employment

land use worker heterogeneity and welfare benefits of public goods we show that investments in public goods change the optimal land use in their vicinity leading to additional welfare benefits this occurs through two sorting mechanisms first availability of public goods leads to higher population densities second population groups sort according to their preferences for public goods we develop a structural spatial general equilibrium model that accounts for these effects the model is estimated using data on transport infrastructure commuting behaviour land use and land rents for some 3000 zip codes in the netherlands and for three levels of education welfare benefits of investments in public transport infrastructure are shown to differ sharply by workers educational attainment welfare gains from changes in land use account for up to 30 of the total benefits of a transport investment