financial wealth consumption smoothing and income shocks arising from job loss one of the reasons for setting up an unemployment insurance scheme is to allow job losers to smooth consumption we test for the impact of unemployment benefits on changes in household food expenditure of individuals who have recently experienced a job loss we also study the relationship between unemployment benefits and the financial wealth of the unemployed from our empirical analysis we conclude that for households without financial wealth at the time of job loss unemployment benefits help to smooth food consumption for households running debt before job loss there is evidence that lower replacement rates lead to a postponement of debt repayment

the long term effects of ui extensions on employment the majority of papers analyzing the employment effects of unemployment insurance ui benefit durations focus on the duration of the first unemployment spell in this paper we make two contributions first we use a regression discontinuity design to analyze the long term effects of extensions in ui durations these estimates differ from standard estimates in that they incorporate differences in ui benefit receipt and employment due to recurrent unemployment spells second we derive a welfare formula of ui extensions that incorporates recurrent nonemployment spells

a review of renewable investment and power system operational issues in bangladesh generation investments especially large scale variable renewable energy requires careful scrutiny of the state of the power system power system planning and operations in a developing country like bangladesh can often achieve significant improvements in economics and security of supply through modest and prudent investments a review of the bangladesh power sector is presented in this paper that highlights a changes to dispatch protocols to undertake fuel constrained dispatch optimization and ancillary services co optimization and pricing b issues related to the allocation of natural gas between sectors and c a technology neutral investment framework the study uses an hourly dispatch and ancillary services co optimization model that also optimizes short to medium term investment decisions the results demonstrate bangladesh can a reduce its production costs by 63 through more efficient dispatch b reduce production costs by 77 by using an additional natural gas quota of 212 mmcfd or a 23 increase and c should have invested in power import and baseload gas coal rather than expensive solar pv projects proposed in 2011 at substantially higher cost at the time when a carbon price is imposed in the model the implied break even cost to justify the solar program is very high in excess of 150 tonne

applied general equilibrium models of taxation and international trade an introduction and survey we wish to acknowledge the help of three referees and of john pencavel on several earlier drafts as well as the assistance of the modelers whose work is referred to in the paper they corrected our lack of understanding of their work and provided many other helpful comments excellent research and bibliographical assistance have been provided by debbie fretz radwan shaban and janet stotsky helpful comments have been made by charles ballard michael boskin lans bovenberg sylvester damus harvey galper glenn harrison gordon lenjosek jack mutti serena ng t n srinivasan charles stuart and eric toder the authors also acknowledgefinancial support from the national bureau of economic research the national science foundation international business machines and the social sciences and humanities research council ottawa canada

valuation of ecosystem goods and services part 1 an integrated dynamic approach abstract this is the first part of a two part paper which offers a new approach to the valuation of ecosystem goods and services the existing literature on environmental valuation is based on two distinct foundations the ecological valuation methods derive values by a cost of production approach their common characteristic is the neglect of consumer preferences the economic valuation methods focus on the exchange value of ecosystem services their common characteristic is that they are finally based on consumer preferences and do not adequately take account of the complex internal structure of ecosystems as the existing methods for the valuation of ecosystem services emphasize either the economic system or the ecosystem the main objective of part 1 is to provide the conceptual foundations for a new method of valuation of ecosystem services which deals simultaneously with the ecosystem the economic system and society in a balanced way within a simple pre industrial model it is shown how the interdependencies between the three subsystems influence values and how values change over time

economic dispatch savings in the coal fired power sector an empirical study of china abstract the current equal share dispatch approach has often been criticized for its negative influence on the electricity system operation in china which worsens the energy security environmental sustainability and affordability problems to provide references for the on going electricity market reform this study employs an optimization model to quantify the economic dispatch savings in the coal fired power sector key findings are summarized as follows 1 the heat rates of 2803 coal generators in china range from 273 91 gce kwh to 348 38 gce kwh units in 2014 and the great differences among these generators at different geographical areas exhibit the necessity for economic dispatch 2 5 67 of the coal used for power generation could be saved from economic dispatch in a provincial level the monetary value of which can reduce the average electricity price by 0 0058 yuan kwh in 2014 3 three major political and economic challenges hinder the transition from the current dispatch mode to economic dispatch namely the insufficient running hours for cost recovery limited cross border trading due to electricity over supply and local protectionism and the political economy problems from generators of different ownership types

a computational analysis of japan s generalized system of preferences abstract in this paper we employ a general equilibrium computational model of world trade to evaluate the generalized system of preferences gsp of japan we conclude that the japanese gsp is strongly trade creating because preferential treatment is offered primarily on products for which japan is a major world exporter however tariff concessions result in a deterioration in japan s terms of trade which lowers welfare in japan and improves the welfare of japan s major trading partners among the ldcs the gain from preferential treatment accrues primarily to the asian nics hong kong south korea singapore and taiwan

on the use of ecological prices and system wide indicators derived therefrom to quantify man s impact on the ecosystem abstract ecological prices and other system wide quantitative descriptors of ecosystem functioning are derived from the assumption that ecosystems allocate available resources efficiently among their components however ecological prices are not efficiency prices only and using them does not require one to assume that the ecosystem is completely controlled by man the same prices balance flows of different biomasses in a multicomponent system as such they play the role of exchange prices in a decentralized ecosystem properly defined with the help of ecological prices the resulting ecosystem productivity is no less a significant indicator of ecosystem functioning than the national product is significant for assessing the functioning of an economy considerations of the values taken simultaneously by our proposed indicators and by their economic analogs are of much help in judging the desirability of projects with relatively mild environmental repercussions these values are obtained from an integrated model of a system in which ecological and economic activities are intertwined however for the indicators to have an analytical meaning the methodology should be applied to trace only those dynamic paths during which the system possesses unique state dependent intensive properties in other cases a more comprehensive methodology one which also pays due regard to the viability of the ecosystem must supplement the analytical approach this rather comprehensive methodology is scale dependent and probabilistic in nature while delineating relations between the structure of the system and its behavior this method implies that efficiency and viability are two complementary rather than two commensurate attributes of a single entity an outside observer may be guided by his own values in his attempts to weigh these features but no inherent property of the system exists that supports his values unequivocally nevertheless this paper proposes an approximation to overcome this difficulty and to estimate a quantitative limit to the rate of substitution between productivity and viability such a limit is also an intensive property of the simulated system and the estimation of its value is shown to be crucial for studying the vulnerability of real ecosystems to severe man made disturbances

efficient unemployment insurance and the cost of borrowing abstract this paper presents a simple formula relating the efficiency of the level of unemployment benefits to the cost of saving in an infinite horizon economy in which households can borrow up to their natural borrowing limit i extend baily s 1978 result showing that the benefits of unemployment insurance can be directly related to a measure of households impatience this is possible because in the type of heterogeneous agent models under consideration buffer stock savings and thus the expected consumption drop during unemployment are determined by the prevailing interest rate

energy scarcity and potential of renewable energy in bangladesh abstract energy is one of the indispensable inputs for the survival of human being in the earth bangladesh has the very inadequate amount of indigenous non renewable energy resources even which is being diminished rapidly to increase the electricity generation although the installed electricity generation capacity has been increased to 10 709 mw still the amount is insufficient to meet the demand of the country in addition to this the insufficient power generation hinders the socio economic and industrial development this current problem in power generation of bangladesh can be removed by incorporating renewable energy into electricity generation recently utilization of renewable energy and renewable energy technologies rets is getting momentum in the country to achieve not only energy security but also to reduce environmental pollution and to limit the imminent depletion of the non renewable energy resources overall bangladesh has the vast potential of biomass solar hydro wind and tidal powers this paper outlines the present energy scenario of the country following this the potential of available renewable energy resources is also reviewed and presented in this paper

an experimental examination of general equilibrium tax incidence abstract tax incidence is examined in an experimental general equilibrium production micro economy consistent with predictions the imposition of a tax on corporate capital resulted in a flow of capital out of the corporate sector decreased corporate usage of capital relative to labor and tax shifting through decreases in the relative prices of capital and non corporate output although capital owners were able to shift some of the tax burden the corporate tax resulted in a 35 drop in capital owner s share of payoffs implications for policy are discussed

on the possibility of an inverse relationship between tax rates and government revenues abstract when arthur laffer and other supply side advocates plot total tax revenue as a function of a particular tax rate they draw an upward sloping segment called the normal range followed by a downward sloping segment called the prohibitive range a brief literature review indicates that tax rates on the prohibitive range in theoretical and empirical models have been the result of particularly high tax rates high elasticity parameters or both the labor tax rate which maximizes total revenue for example will depend on the assumed labor supply elasticity this paper introduces a new curve which summarizes the tax rate and elasticity combinations that result in maximum revenues separating the normal area from the prohibitive area a general purpose empirical u s general equilibrium model is used to plot the laffer curve for several elasticities and to plot the newly introduced curve using the labor tax example results indicate that the u s could conceivably be operating in the prohibitive area but that the tax wedge or labor supply elasticity would have to be much higher than most estimates would suggest

the dynamics of natural gas consumption and gdp in bangladesh abstract reserves of natural gas in bangladesh are very large and total demand has increased secularly in recent years this paper examines the causal relationship between the consumption of natural gas and gdp in bangladesh over the period 1980 to 2010 we find that there is a positive unidirectional causality running from gdp to natural gas consumption movements in gdp affect the consumption of natural gas but not vice versa while our results rest on several statistical assumptions they support the pursuit of policies that are in line with energy conservation implementing these policies will be of particular significance in light of the fact that bangladesh s current reserves of natural gas will not meet its current level of consumption demand beyond the next two decades

commensuration and theories of value in ecological economics abstract without a theory of value price in ecological economics the valuation of ecosystem and economic resources cannot be rigorously defended at the crux of the matter is the valuation or mixed units problem of commensurating biophysical inputs outputs which are different this paper critically reviews candidate theories of value which have emerged in the ecological economics literature for dealing with this problem first of all the neo ricardian approach using sraffa type systems is discussed in particular judson s assertion that the sraffa system is suitable for ecological economics is questioned as it is based on circular flow generation of a surplus and exchange values none of these ideas are consistent with a biophysical characterisation of an economic system which is paramount in ecological economics a more fruitful avenue for establishing a biophysical theory of value based on ecological and thermodynamic principles is to extend patterson s quality equivalent methodology qem to explicitly include mass flows in addition to energy at this point a model close to costanza and hannon s biosphere model of price determination emerges the extended qem model however has a number of important advantages over the costanza hannon model because it has a more generalised formulation and is not reliant on necessarily using solar energy as the numeraire the paper concludes with a discussion of some outstanding issues that need to be resolved before a biophysical theory of value can be properly established in ecological economics

household expenditure and the income tax rebates of 2001 using questions expressly added to the consumer expenditure survey we estimate the change in consumption expenditures caused by the 2001 federal income tax rebates and test the permanent income hypothesis we exploit the unique randomized timing of rebate receipt across households households spent 20 to 40 percent of their rebates on nondurable goods during the three month period in which their rebates arrived and roughly two thirds of their rebates cumulatively during this period and the subsequent three month period the implied effects on aggregate consumption demand are substantial consistent with liquidity constraints responses are larger for households with low liquid wealth or low income

modeling and forecasting natural gas demand in bangladesh natural gas is the major indigenous source of energy in bangladesh and accounts for almost one half of all primary energy used in the country per capita and total energy use in bangladesh is still very small and it is important to understand how energy and natural gas demand will evolve in the future we develop a dynamic econometric model to understand the natural gas demand in bangladesh both in the national level and also for a few sub sectors our demand model shows large long run income elasticity around 1 5 for aggregate demand for natural gas forecasts into the future also show a larger demand in the future than predicted by various national and multilateral organizations even then it is possible that our forecasts could still be at the lower end of the future energy demand price response was statistically not different from zero indicating that prices are possibly too low and that there is a large suppressed demand for natural gas in the country

workers compensation and consumption smoothing abstract this paper investigates the consumption smoothing benefits of state workers compensation wc programs these programs are among the largest and most controversial forms of social insurance with the putative purpose of supporting families affected by unexpected income shocks due to workplace injuries and illnesses using health and retirement study hrs data for a sample of workers who have experienced a work related work limiting disability i find that a 10 increase in wc benefit generosity offsets the drop in household consumption upon injury by 3 to 5 moreover my estimates imply that if benefits were very low the drop in consumption upon injury would be in the range of 30 a model adapted from the literature on optimal social insurance yields a formula for the optimal level of wc benefits which depends on empirical estimates of the consumption smoothing parameter my calculations suggest that current wc benefit levels are somewhat higher than optimal

does unemployment insurance crowd out spousal labor supply previous research on unemployment insurance ui has emphasized the program s effect on individual search behavior this state contingent income may also reduce the labor supply of family members during the unemployment spell we investigate this question within the context of wives labor supply responses to their husbands unemployment spells we find strong crowdout of this form of family self insurance our estimates imply that for each dollar of ui receipt wives earn up to 73 cents less the reduction in spousal hours of work is over 40 as large as previous estimates of the effect of ui on search time of husbands

a computational general equilibrium model with endogenous unemployment an analysis of the 1980 fiscal reform in mexico abstract in this paper we develop a general equilibrium model of the mexican economy in which unemployment and government deficits play important roles the unemployment rate depends on a downwardly rigid real wage in the urban sector the government runs a deficit simply by selling bonds that consumers consider perfect substitutes for physical capital as savings instruments the model is used to analyze the impact of the 1980 fiscal reform the presence of the rigid real wage and alternative specifications of government policies regarding the size of the deficit are found to have significant effects on the comparative statics results whether or not the reform improves the welfare of rural households compared to urban households for example depends on whether government policy is to keep the deficit constant or keep expenditures constant in response to changes in tax revenues

the role of thermodynamics in the study of economic and ecological systems abstract economic theory has always maintained that economic value is generated solely within the economy where it is fully distributed among the factors of production before being consumed according to this theory the economy is an isolated system that does not need flows to pass across its boundaries in support of its steady state general equilibrium from a thermodynamic point of view this idea is unacceptable according to thermodynamic theory any open system which allows flows of matter and energy to cross its boundaries is capable of maintaining itself in steady state only because it transport value from its environment to restore the value that has been consumed within the system and dissipated drawing on the analogy with thermodynamics this paper replaces the traditional systemic analog of the economy which is the closed circular flow process with the steady flow process according to this analog any efficient economy is an open system both physically and economically requiring a flow of economic value to maintain its steady state in other words an economically isolated system has to be inefficient and is bound to misallocate and overuse environmental resources whether the economy behaves as an economically isolated inefficient or open efficient system is an empirical question however if real economies are economically open and efficient and environmental resources are abused due to the economy s unrestrained material growth parts of traditional economic theory espicially those related to benefit evaluation will have to be modified policy recommendations will be affected in any case because internalization the panacea of resource misallocations cannot be more than a temporary solution instead of opening the economy internalization encloses the harmed resource and saves it by abusing excessively other environmental resources

toward consilience between biology and economics the contribution of ecological economics abstract during its ten year history ecological economics has made a real difference in the way economists look at the natural world and in the way biologists look at the economy in this survey article we examine the contributions to the journal in terms of e o wilson s concept of consilience that is his argument that the methods and assumptions of any field of study should be consistent with the known and accepted facts in other disciplines in particular we examine the contributions of ecological economics to reconciling the economic theory of the consumer and producer with biophysical reality

the effects of energy taxes on the kenyan economy a cge analysis abstract the paper utilizes a computable general equilibrium model to evaluate the impact of the second oil price shock and consequent energy tax policies on the kenyan economy simulations show that dramatic change in energy prices and consequent changes in domestic energy consumption generate sequential feedbacks in the production process and affect economic structures terms of trade deteriorate the balance of payments deficit increases and national income falls energy import tariffs and a sales tax are effective policy instruments in controlling energy consumption and increasing government revenue both energy policies have net negative effects on other economic activities similar to those observed under the oil price shock as long as there are no other economically feasible sources of energy supplies there are economic losses associated with less petroleum product consumption in a net oil importing developing economy with oil intensive production technology

a security constrained bid clearing system for the new zealand wholesale electricity market this paper reports upon the mathematical models and implementation of the scheduling pricing and dispatch spd application for the new zealand electricity market nzem spd analyzes bids for energy offers reserve offers and energy demands and recognizes explicitly the effects on bid clearing due to transmission congestion network losses reserve requirements and ramp rate limits advanced lp solution methods are utilized to solve the large scale constrained optimization problem results on a 67 bus test system and the nzem are included

foreign direct investment in the energy and power sector in bangladesh implications for economic growth abstract in this paper we present a discussion on current energy and power situation of the country and examine the causal relationship between fdi in the energy and power sector and economic growth in bangladesh for the period 1972 2010 related trend reveals a considerable gap between energy production and energy use during this period moreover inflow trend of fdi was also fluctuating over the studied period we also find that there are robust positive and unidirectional short run causal relationships running from fdi to energy use and from energy use to gdp growth empirical results also confirm a causal relationship for the energy use equation in the long run considering the resource and technology gap and requirements for the development of the energy and power sector fdi should be encouraged to this sector that would be imperative to the targeted gdp growth

pricing energy and ancillary services in integrated market systems by an optimal power flow a detailed ac opf based formulation for procuring pricing and settling energy and ancillary service in simultaneous auctions by integrated market systems is presented the paper provides clear definitions of locational marginal prices for energy and ancillary service marginal prices in terms of lagrange multipliers the characteristics of the prices are analyzed especially when economic substitution among ancillary services is required the paper also evaluates the conditions under which opportunity costs are incurred to units that provide ancillary services it is particularly shown that the intuitive belief that the provision of regulation down service does not incur opportunity cost to the provider in general is not true

second best agricultural policy abstract since full economic liberalization is not generally feasible getting the prices of selected agricultural markets right involves optimal price distortions a methodology is developed for calculating the second best output price in a particular market by incorporating externalities government revenue constraints and distortions in other markets into the marginal social cost and benefit schedules for that market in the illustrative application to thailand tax friction consumption externalities and the optimal tariff argument are seen to support an export tax on rice even though import tariffs already discriminate against agricultural exports

modelling renewable energy impact on the electricity market in india renewable power generation development most notably for wind and solar has taken off at a rapid pace in india especially in the last 4 years while these developments have many positive aspects a rapid shift in balance of baseload and intermittent generation must be assessed carefully to ensure the share of renewable power generation increases without compromising system security and economics seasonal and spatial variability of wind and to a lesser extent that of solar can render these resources to have low availability for a significant part of the year leading to an increase in unserved energy i e deteriorate system reliability the intermittency of generation also impacts on inter state power flows and lead to higher congestion in the grid climate model results provide a rich set of information on the nature of solar wind variability that can be embedded in an electricity market simulation tool to assess these impacts on prices generation dispatch and power flows we have developed a modelling analysis for the indian national electricity market informed by csiro climate model results we have assessed the added costs arising from intermittency to put in perspective the true costs and benefits of renewable power we have focused on the near term developments in 2017 to show how some of the high renewable growth scenarios included in the indian national electricity plan may imply significant pressure on inter state region transfer capability and lead to a significant worsening of system reliability the outcome of our modelling analysis suggests that a more orderly and balanced development of renewable and conventional power generation capacity is needed with a stronger focus on system economics and security

the efficiency gains from dynamic tax reform this paper presents a new simulation methodology for determining the pure efficiency gains from tax reform along the general equilibrium rational expectations growth path of life cycle economies the principal findings concern the effects of switching from a proportional income tax with rates similar to those in the u s to either a proportional tax on consumption or a proportional tax on labor income a switch to consumption taxation generates a sustainable welfare gain of almost 2 percent of lifetime resources in contrast a transition to wage taxation generates a loss of greater than percent of lifetime re sources a second general result is that even a mild degree of progressivity in the income tax system imposes a very large efficiency cost this abstract was borrowed from another version of this item

the role of unemployment insurance in an economy with liquidity constraints and moral hazard the potential welfare benefits of unemployment insurance along with the optimal replacement ratio are studied using a quantitative dynamic general equilibrium model to provide a role for unemployment insurance agents in our economy face exogenous idiosyncratic employment shocks and are unable to borrow or insure themselves through private markets in the absence of moral hazard replacement ratios as high as 65 are optimal and the welfare benefits of unemployment insurance are quite large however if there is moral hazard and the replacement ratio is not set optimally but is instead set to an empirically plausible value the economy can be much worse off than it would be without unemployment insurance

moral hazard vs liquidity and optimal unemployment insurance this paper presents new evidence on why unemployment insurance ui benefits affect search behavior and develops a simple method of calculating the welfare gains from ui using this evidence i show that 60 percent of the increase in unemployment durations caused by ui benefits is due to a liquidity effect rather than distortions on marginal incentives to search moral hazard by combining two empirical strategies first i find that increases in benefits have much larger effects on durations for liquidity constrained households second lump sum severance payments increase durations substantially among constrained households i derive a formula for the optimal benefit level that depends only on the reduced form liquidity and moral hazard elasticities the formula implies that the optimal ui benefit level exceeds 50 percent of the wage the exact identification approach to welfare analysis proposed here yields robust optimal policy results because it does not require structural estimation of primitives

unemployment insurance takeup rates and the after tax value of benefits the recent decline in the unemployment insurance ui takeup rate has puzzled researchers using administrative data with accurate information on the potential level and duration of benefits we examine whether a separating employee receives ui we find a strong positive effect of the benefit level on takeup and smaller effects of the potential duration and the tax treatment of benefits simulations indicate that the recent inclusion of ui in the income tax base can account for most of the previously unexplained decline in ui receipt

economic effects of vat reforms in germany in the tax policy debate differentiation of value added taxes is often justified by distributional concerns our quantitative analysis for germany indicates that such concerns are misplaced we find that the abolition of vat differentiation has only negligible redistributive effects instead reduced vat are found to act as industry specific subsidies whereas the overall welfare effects of pure vat reforms are very small a revenue neutral introduction of a harmonised vat combined with reductions in the marginal income tax rates or social security contributions turns out to produce substantial welfare gains for all households

erratum moral hazard versus liquidity and optimal unemployment insurance this paper presents new evidence on why unemployment insurance ui benefits affect search behavior and develops a simple method of calculating the welfare gains from ui using this evidence i show that 60 percent of the increase in unemployment durations caused by ui benefits is due to a liquidity effect rather than distortions on marginal incentives to search moral hazard by combining two empirical strategies first i find that increases in benefits have much larger effects on durations for liquidity constrained households second lump sum severance payments increase durations substantially among constrained households i derive a formula for the optimal benefit level that depends only on the reduced form liquidity and moral hazard elasticities the formula implies that the optimal ui benefit level exceeds 50 percent of the wage the exact identification approach to welfare analysis proposed here yields robust optimal policy results because it does not require structural estimation of primitives c 2008 by the university of chicago all rights reserved this abstract was borrowed from another version of this item

measures of energy cost and value in ecosystems the physical output of ecological processes have different values even though they may be measured in the same physical units using linear input output theory we derive a set of weights based on direct and indirect energy requirements for ecosystem commodities which uniquely converts them into commensurable unit costs under certain conditions these costs are equal to values or prices using this system behavioral theories can be better posed for experimental verification

job search and savings wealth effects and duration dependence this article studies a risk averse worker s optimal savings and job search behavior as she moves back and forth between employment and unemployment we show that job search effort is negatively related to wealth under the assumption of additively separable utility consequently job search exhibits positive unemployment duration dependence because wealth is drawn down to smooth consumption as the spell progresses finally given optimal search savings still provide imperfect insurance against income fluctuations precautionary savings are built up during employment spells and run down during unemployment spells but the consumption path will not be perfectly smooth over states

ecological production based pricing of biosphere processes abstract ecological pricing theory and method is reviewed and then applied to the valuation of biosphere processes and services ecological pricing values biosphere processes on the basis of biophysical interdependencies between all parts of the ecosystem not just those that have direct or obvious value to humans the application of the ecological pricing method to the biosphere for 1994 indicates that the total value of primary ecological inputs services to be nearly us 25 trillion this compares with us 33 trillion obtained in the costanza et al 1997 study our analysis also indicated a good correspondence between the shadow ecological price and the observed market price for all marketable goods except fossil fuel which was undervalued by the market

a dynamic hierarchical approach to understanding and managing natural economic systems the study of economic systems and their guidance towards sustainability can be enhanced by understanding how natural systems use materials and energy at various levels of system organization how these levels interrelate and how interrelationships change towards this end the paper introduces natural economics as an approach to understanding the dynamics of hierarchical systems we define the concepts of natural economics to facilitate the description and assessment of system change and present dynamic modeling as a method for empirical research and as a tool for management decision making we illustrate with empirical applications the use of dynamic modeling at various levels of system organization empirical illustrations range from dynamic models of simple physical systems of material transport energy degradation and self organized criticality to models of complex industrial systems such as us iron ore mining and steel production the insights derived from the natural economics approach are used to draw conclusions for the study and management of economy environment interactions

ecosystem prices activity analysis applied to ecosystems abstract in this paper a method is developed to derive prices for natural goods from information about material and energy flows within ecosystems the derivation is based on an analogy between ecological and economic systems both systems are characterized by flows of material and energy to derive ecosystem prices the mathematical structure of koopman s economic linear production model his activity analysis is applied to a material flow model of ecosystems the ecological interpretation of these prices is discussed and the uniqueness of the price system is investigated an algorithm for price calculation is derived and demonstrated with a numerical example finally it is discussed whether ecosystem prices may be suitable as surrogates for economic valuations of natural goods

external sector closing rules in applied general equilibrium models abstract this paper examines formulations of external sector behavior adopted in some of the recent applied general equilibrium models in many cases these models are constructed for single economies and the model builder attempts to use a convenient external sector specification to close the model issues and difficulties with export demand and import supply functions for foreigners which satisfy trade balance and the modeling of small economy price taking behavior are explored

home is where the equity is mortgage refinancing and household consumption applying a permanent income model with exogenous liquidity constraints and mortgage behavior household refinancing when mortgage interest rates are historically high and rising a persistent empirical puzzle is explained using data from the panel study of income dynamics households experiencing an unemployment shock and having limited initial liquid assets to draw upon are shown to have been 25 more likely to refinance 1991 94 on average such liquidity constrained households converted over two thirds of every dollar of equity they removed into current consumption as mortgage rates plummeted 1991 94 producing an estimated expenditure stimulus of at least 28 billion

cash on hand and competing models of intertemporal behavior new evidence from the labor market this paper presents new tests of the permanent income hypothesis and other widely used models of household behavior using data from the labor market we estimate the excess sensitivity of job search behavior to cash on hand using sharp discontinuities in eligibility for severance pay and extended unemployment insurance ui benefits in austria analyzing data for over one half million job losers we obtain three empirical results 1 a lump sum severance payment equal to two months of earnings reduces the job finding rate by 8 12 on average 2 an extension of the potential duration of ui benefits from 20 weeks to 30 weeks similarly lowers job finding rates in the first 20 weeks of search by 5 9 and 3 increases in the duration of search induced by the two programs have little or no effect on subsequent job match quality using a search theoretic model we show that estimates of the relative effect of severance pay and extended benefits can be used to calibrate and test a wide set of intertemporal models our estimates of this ratio are inconsistent with the predictions of a simple permanent income model as well as naive rule of thumb behavior the representative job searcher in our data is 70 of the way between the permanent income benchmark and credit constrained behavior in terms of sensitivity to cash on hand

capacity and energy only markets under high renewable penetration this paper presents a multi nodal intertemporal cournot gaming model with transmission constraints and uses it to simulate energy only and capacity energy market designs in the presence of uncertainties stemming from intermittent renewable power generation both market paradigms are compared to a competitive benchmark in order to determine which one performs better in a concentrated market with significant penetration of wind and solar generation as a specific example the model is applied to the south australian zone of the australian national electricity market nem the simulation results for the time interval 2013 2030 show that the capacity energy market has the potential to induce significant new capacity and push prices much closer to the competitive level in contrast to the current energy only market design