temperature shocks and the cost of equity capital implications for climate change perceptions financial market information can provide an objective assessment of losses anticipated from temperature changes in an apt model in which temperature shocks are a systematic risk factor the risk premium is significantly negative loadings for most assets are negative and asset portfolios in more vulnerable industries have stronger negative loadings on a temperature shock factor weighted average increases in the cost of equity capital attributed to uncertainty about temperature changes are 0 22 percent implying a present value loss of 7 92 percent of wealth these costs represent a new channel that may contribute to cost of climate change assessment

individual option prices for climate change mitigation abstract willingness to pay for climate change mitigation depends on people s perceptions about just how bad things will get if nothing is done individual subjective distributions for future climate conditions are combined with stated choices over alternative climate policies to estimate individual option prices the appropriate ex ante welfare measure in the face of uncertainty for climate change mitigation we find statistically significant sensitivity of estimated option prices to both expected future conditions and uncertainty about future conditions

an assessment of the influence of bioenergy and marketed land amenity values on land uses in the midwestern us there is substantial concern that bioenergy policies could swamp other considerations such as environmental values and lead to large scale conversions of land from forest to crops this study examines how bioenergy and marketed environmental rents for forestland potentially influence land use in the midwestern us we hypothesize that current land uses reflect market values for environmental benefits of forestland so that the marketed component of the environmental value of land can be captured as the difference between census land values and value of land as a timber asset we use a multinomial logit model to estimate the land use shares of forests crops and urban in ohio indiana and illinois the results show that marketed environmental rents increase forestland relative to cropland to examine the effects of biofuels on land use we conduct policy analysis by altering future land rents our baseline scenario projects that urban development uses mostly cropland but with higher crop rents resulting from increased demand for bioenergy there will be significant losses of forestland to urban and cropland on the other hand if marketed environmental rents grow while crop rents are maintained at their baseline value urban growth will occur primarily at the expense of cropland

how do inputs and weather drive wheat yield volatility the example of germany increases in cereals production risk are commonly related to increases in weather risk we analyze weather induced changes in wheat yield volatility as a systemic weather risk in germany we disentangle however the relative impacts of inputs and weather on regional yield volatility for this purpose we augment a production function with phenologically aggregated weather variables increasing volatility can be traced back to weather changes only in some regions on average inputs explain 49 of the total actual wheat yield volatility while weather explains 43 models with only weather variables deliver biased but reasonable approximations for climate impact research

weather variations and international trade in this paper i investigate the effect of weather variations in the exporter and importer countries separately as well as a the difference between weather variations in both countries on bilateral trade flows the analysis is done at the country sectoral and product levels worldwide and over the 1992 2014 period i find a negative effect of temperature variations in the exporter country and in the difference between exporter and importer countries on bilateral trade at the country level at the product level both negative and positive effects arise but the negative effect of temperature dominates the temperature effects are on the agricultural and manufacturing sectors especially in the textile and metals sectors i show that possible channels are the impact of temperature on output and labour productivity the negative impacts are larger in exporter countries that are closer to the equator that have lower quality of institutions and that export to more remote countries if countries are able to adapt to climate change the long term effects of temperature variations should be lower than the contemporaneous effect nevertheless my results on the long term effects analysis do not support this hypothesis suggesting no or very low adaptation moreover the negative effect of temperature is persistent and cumulative through several years after the temperature shock concerning precipitation variation effects they are found mainly at the product level with the positive effect dominating for the affected products

endogenous land use and the ricardian valuation of climate change the ricardian technique uses cross sectional variation in the capitalized value of climate in land to infer the agricultural costs or benefits of dynamic climate change while a practical approach for predicting the consequences of global warming with readily available data it may yield biased results when land use decisions depend on the climate attributes being valued and when land has unobserved attributes that differ with the use to which it is put this paper illustrates the conditions under which such a bias will occur describes an empirical model that corrects for it and estimates that model with agricultural census data from brazil the approach moreover allows constraints on adjustment to be explicitly incorporated into the ricardian framework relaxing one of that technique s most conspicuous assumptions

the economic impacts of climate change evidence from agricultural output and random fluctuations in weather fisher et al 2012 hereafter fhrs have uncovered coding and data errors in our paper deschenes and greenstone 2007 hereafter dg we acknowledge and are embarrassed by these mistakes we are grateful to fhrs for uncovering them we hope that this reply will also contribute to advancing the literature on the vital question of the impact of climate change on the us agricultural sector fhrs main critiques of dg are as follows i there are errors in the weather data and climate change projections used by dg ii the climate change projections are based on the hadley 2 model and scenarios rather than the more recent hadley 3 model and scenarios iii standard errors are biased due to spatial correlation iv the inclusion of state by year fixed effects does not leave enough weather variation to obtain meaningful estimates of the relationship between agriculture profits and weather v storage and inventory adjustment in response to yield shocks invalidate the use of annual profit data and vi fhrs argue that a better specified hedonic model produces robust estimates unlike the results reported in dg four of these critiques have little basis and we respond to them here in the introduction specifically with respect to ii the more recent daily climate predictions were not available when we wrote dg nevertheless the most important issue is providing the reliable estimates of climate change and in this note we report estimates based on the climate model we used in dg and a more recent one that we gained access to in the meantime iii in the primary table on agricultural profits dg reports two sets of standard errors with the first clustered at the county level and the second based on a variance covariance matrix that accounts for spatial correlation using the method proposed in conley 1999 thus the claim of fhrs 2012 seems overblown nevertheless to ease comparisons of papers in this literature this note will adopt the fhrs convention of reporting estimated standard errors clustered at the county and state levels we find that inference is largely unaffected by the choice between these different assumptions about the variance covariance matrix

cadillac desert revisited property rights public policy and water resource depletion to alleviate arizona s dependence on groundwater the federal government subsidized construction of the central arizona project cap to import water from the colorado river in exchange for the subsidy arizona reformed its groundwater law to eliminate common property pumping and to ban groundwater mining after the year 2025 we build a model of water resource development in which imported water is a capacity constrained backstop the model is applied to quantify the welfare effects of alternative cap construction dates and arizona groundwater laws we reach two general conclusions first cap was completed 86 years too early in 1987 at a deadweight loss of 2 612 billion ironically construction in 1987 yielded lower surplus than never constructing cap second the political exchange of reform for subsidy introduced a greater loss 2 612 billion than it corrected 0 810 billion the exchange was worse than doing nothing at all

the impact of global warming on agriculture a ricardian analysis reply we measure the economic impact of climate on land prices using cross sectional data on climate farmland prices and other economic and geophysical data for almost 3 000 counties in the united states we find that higher temperatures in all seasons except autumn reduce average farm values while more precipitation outside of autumn increases farm values applying the model to a global warming scenario shows a significantly lower estimated impact of global warming on u s agriculture than the traditional production function approach and in one case suggests that even without co sub 2 fertilization global warming may have economic benefits for agriculture 16 refs 5 figs 5 tabs

designing climate mitigation policy this us paper provides an exhaustive review of critical issues in the design of climate mitigation policy by pulling together key findings and controversies from diverse literatures on mitigation costs damage valuation policy instrument choice technological innovation and international climate policy the authors begin with the broadest issue of how high assessments suggest the near and medium term price on greenhouse gases would need to be both under cost effective stabilization of global climate and under net benefit maximization or pigouvian emissions pricing the remainder of the paper focuses on the appropriate scope of regulation issues in policy instrument choice complementary technology policy and international policy architectures

how can african agriculture adapt to climate change a counterfactual analysis from ethiopia we analyze the impact of different adaptation strategies on crop net revenues in the nile basin of ethiopia we estimate a multinomial endogenous switching regression model of climate change adaptation and crop net revenues and implement a counterfactual analysis households data are combined with spatial climate data we find that adaptation to climate change based upon a portfolio of strategies significantly increases farm net revenues changing crop varieties has a positive and significant impact on net revenues when coupled with water conservation strategies or soil conservation strategies but not when implemented in isolation jel q54 q56

the strategic impact of references in business markets we investigate a business to business context and ask when and why a firm should announce a reference program that commits the firm to facilitating the flow of information about the efficacy of its products from early adopters to potential late adopters we model a monopolist manufacturer with a new innovation that can be sold to two potential customers we demonstrate here two benefits of a reference program that relate not to an increase in later adopters willingness to pay but to an increase in the willingness to pay of the early adopters themselves the impact on the early adopters willingness to pay arises in two ways as a result of their observation of the firm s commitment to information transmission first in a model of symmetric uncertainty we show that the announcement of a reference program facilitates dynamic pricing by the manufacturer in the sense that it allows the firm to provide temporary exclusive use of the technology to one of the customers this creates more value which the manufacturer can extract via a higher price in this way a reference program can serve as a partial substitute for an exclusive use contract in a model with asymmetric information we demonstrate that under certain conditions the firm is able to use the reference program as a signal again to the early adopting customer that its technology is of high quality however such a signal requires significant discounts to early adopters to ensure separation as a result a pooling equilibrium dominates in which the manufacturer fosters references regardless of its quality finally by allowing the firms private information to be stochastic we show that separation may be a dominant outcome

optimal dynamic carbon taxes in a climate economy model with distortionary fiscal policy how should carbon be taxed as a part of fiscal policy the literature on optimal carbon pricing often abstracts from other taxes however when governments raise revenues with distortionary taxes carbon levies have fiscal impacts while they raise revenues directly they may shrink the bases of other taxes e g by decreasing employment this article theoretically characterizes and then quantifies optimal carbon taxes in a dynamic general equilibrium climate economy model with distortionary fiscal policy first this article establishes a novel theoretical relationship between the optimal taxation of carbon and of capital income this link arises because carbon emissions destroy natural capital they accumulate in the atmosphere and decrease future output consequently this article shows how the standard logic against capital income taxes extends to distortions on environmental capital investments second this article characterizes optimal climate policy in sub optimal fiscal settings where income taxes are constrained to remain at their observed levels third this article presents a detailed calibration that builds on the seminal dice approach but adds features essential for a setting with distortionary taxes such as a differentiation between climate change production impacts e g on agriculture and direct utility impacts e g on biodiversity existence value the central quantitative finding is that optimal carbon tax schedules are 8 24 lower when there are distortionary taxes compared to the setting with lump sum taxes considered in the literature

econometric process models for integrated assessment of agricultural production systems this article develops the conceptual and empirical basis for a class of empirical economic production models that can be linked to site specific biophysical models for use in integrated assessment research site specific data are used to estimate econometric production models and these data and models are then incorporated into a simulation model that represents the decision making process of the farmer as a sequence of discrete and continuous land use and input use decisions an econometric process model of the dryland grain production system of the northern plains demonstrates the capabilities of this type of model to simulate decision making both within and outside the range of observed data copyright 2001 oxford university press

financialisation and the dynamics of offshoring in the usa imports are linked to higher cost mark ups and firm profits and the gains from such non competitive imports the result of offshoring are increasingly associated with the reinvestment of these higher profits our regression analysis of 35 us manufacturing and service industries over the period 1998 2006 supports aggregate and firm level studies showing that offshoring is associated with a higher share of corporate profit in total value added but the dynamic gains from offshoring have not been fully realised because firms have purchased financial assets especially share buybacks and higher dividend payments to raise shareholder value rather than investing in productive assets that raise productivity growth employment and income despite the corporate sector s contribution to national savings over the past decade the offshoring financialisation linkage reduces the capacity of non financial corporations to act as a driver of the recovery from the economic crisis that emerged in 2008

the value of heterogeneous property rights and the costs of water volatility the system of prior appropriation in the western unites states prioritizes property rights for water based on the establishment of beneficial use creating a hierarchy where rights initiated first are more secure i estimate the demand for security in water rights through their capitalization in agricultural property markets in the yakima river basin a major watershed in washington state all water rights are satisfied in an average year so the relative value of secure property rights is a function of water supply volatility and the costs of droughts are predominantly born by those with weak rights in aggregate security in water rights does not capitalize into property values at the irrigation district level however there is heterogeneity in the premium for secure water rights the lack of a premium for district level water security is robust to a variety of econometric methods to account for correlated district unobservables and the null result produces an economically significant upper bound on the value to water security for the district the ability for farmers to adapt to water supply volatility as well as expectations about water markets and government infrastructure investment are leading explanations for the lack of an aggregate premium these explanations are supported by the pattern of heterogeneity in the water security premium

an analysis of the impact of climate change on crop yields and yield variability this paper develops an econometric model of stochastic production functions to quantify the impacts of climatic variables on the mean variance and covariance of crop yields the estimates of the production function parameters and their elasticities are utilized to analyse the impacts of the projected climate change on agriculture the results show that the climate change will have modest effects on the mean crop yields but will significantly reduce the variance and covariance for most of the crops considered the results have implications for allocations of agricultural land among crops and for crop production mix

valuing the impact of large scale ecological change in a market the effect of climate change this paper establishes a methodology for valuing the impact of large scale ecological changes in a market given the large capital stocks inherent in most ecological systems the dynamic nature of most ecological change and the dynamic response of markets it is critical to build dynamic models to capture the resulting effects this paper demonstrates how to construct such a model using the impacts of climate change on u s timber markets as an example across a wide range of scenarios and models warming is predicted to expand timber supplies and thus benefit u s timber markets copyright 1998 by american economic association

resilience weather and dynamic adjustments in agroecosystems the case of wheat yield in england the paper presents an investigation of agroecosystem dynamics with an application to wheat yield data in england over the period 1885 2012 the analysis relies on a threshold quantile autoregressive model the model allows for lag effects to vary across quantiles of the distribution as well as with the values taken by the lagged variables the analysis documents the dynamics and persistence of yield adjustments to shocks the estimates indicate the presence of dynamic instability in the lower quantile of the distribution the analysis shows that after controlling for the role of technological trend wheat yield exhibits resilience to adverse weather shocks

the impact of global warming on agriculture a ricardian analysis comment the paper assesses the ricardian analysis of the impact of global warming on agriculture and the significance of the ricardian approach to estimating adjustment costs

integrating economic analysis and the science of climate instability abstract scientific understanding of climate change and climate instability has undergone a revolution in the past decade with the discovery of numerous past climate transitions so rapid and so unlike the expectation of smooth climate changes that they would have previously been unbelievable to the scientific community models commonly used by economists to assess the wisdom of adapting to human induced climate change rather than averting it lack the ability to incorporate this new scientific knowledge here we identify and explain the nature of recent scientific advances and describe the key ways in which failure to reflect new knowledge in economic analysis skews the results of that analysis this includes the understanding that economic optimization models reliant on convexity are inherently unable to determine an optimal policy solution it is incumbent on economists to understand and to incorporate the new science in their models and on climatologists and other scientists to understand the basis of economic models so that they can assist in this essential effort

forced sales and farmland prices we analyze farmland prices in the german federal state of brandenburg from 2000 to 2011 with the aim to understand the price formation process in farmland foreclosures pressured sales usually result in a price discount due to time constraints however the land is sold using public auctions this may lead to a price premium since the effect of a foreclosure on farmland prices is ambiguous we empirically quantify the overall effect we use matching techniques and a regression based approach we find that on average price premiums are realized though the effect depends on prevailing land market conditions