modelling real interest rates abstract in this paper we model real interest rates as a generalised mean reverting ornstein uhlenbeck process empirical tests of the model using us and uk data for the period 1870 1975 shows that there exists significant mean reversion in both the us and uk for real interest rates inflation rates and nominal interest rates we present evidence for some stylised empirical facts which might be incorporated in models linking real interest rates inflation and nominal interest rates

the effects of minimum wages on wage dispersion and employment evidence from the u k wages councils using data on wages council coverage from the united kingdom new earnings survey the authors examine the impact of mandated minimum wages on wage dispersion and employment in the united kingdom in the 1980s they find evidence that a dramatic decline in the toughness of the regulation imposed by the wages councils through the 1980s a decline that is in the level of the minimum wage relative to the average wage significantly contributed to widening wage dispersion over those years there is however no evidence of an increase in employment resulting from the weakening bite of the wages council minimum pay rates instead consistent with the conclusions of several recent u s studies the findings suggest that the minimum wage had either no effect or a positive effect on employment

on measuring child costs with applications to poor countries the theoretical basis for measuring child costs is discussed and detailed consideration is given to two straightforward procedures for calculation engel s food share method and rothbarth s adult good method each of these methods embodies different definitions of child costs so that the same empirical evidence can generate quite different estimates depending on the method used it is shown that true costs are generally overstated by engel s method and understated by rothbarth s procedure although the latter unlike the former can provide a sensible starting point for cost measurement our estimates from sri lankan and indonesian data suggest that children cost their parents about 30 40 percent of what they spend on themselves

wind energy deployment in the u s an empirical analysis of the role of federal and state policies abstract using a 50 state panel dataset covering the years 1990 2011 we empirically examine the effectiveness of national and state level policies that encourage wind energy deployment in the u s this study is the first to use econometric techniques to examine both the impact of the flagship federal policy the production tax credit and the influence of the production tax credit on the effectiveness of state level policies first we show that the national production tax credit alone has been effective in promoting wind energy deployment 1 4 gw per year on average in the u s second we show that production tax credit influences the effectiveness of state level policies in promoting wind deployment for example in the presence of the production tax credit mandatory green power option increases wind deployment in a state by 200 mw per year on average third we show that the array of renewable energy resources within a given state positively influences the responsiveness to state and national wind policies

a review on global wind energy policy with the increasing negative effects of fossil fuel combustion on the environment in addition to limited stock of fossil fuel have forced many countries to inquire into and change to environmentally friendly alternatives that are renewable to sustain the increasing energy demand energy policy plays a vital role to mitigate the impacts of global warming and crisis of energy availability this paper explores the wind energy industry from the point of view of the wind energy policy it is noticed that energy policy could help increasing wind power generation as well as stimulating the energy industry it may be stated that without specific energy policy a country would not be able to solve the acute problems like reducing greenhouse gases ghgs emission scarcity of energy etc this paper discussed the existing successful energy policies for few selected countries based on literatures it has been found that fit rps incentives pricing law and quota system are the most useful energy policies practiced by many countries around the world then status of wind energy policy for malaysia was investigated and compared with few selected countries around the world

an intertemporal general equilibrium model of asset prices this paper develops a continuous time general equilibrium model of a simple but complete economy and uses it to examine the behavior of asset prices in this model asset prices and their stochastic properties are determined endogenously one principal result is a partial differential equation which asset prices must satisfy the solution of this equation gives the equilibrium price of any asset in terms of the underlying real variables in the economy in this paper we develop a general equilibrium asset pricing model for use in applied research an important feature of the model is its integration of real and financial markets among other things the model endogenously determines the stochastic process followed by the equilibrium price of any financial asset and shows how this process depends on the underlying real variables the model is fully consistent with rational expectations and maximizing behavior on the part of all agents our framework is general enough to include many of the fundamental forces affecting asset markets yet it is tractable enough to be specialized easily to produce specific testable results furthermore the model can be extended in a number of straightforward ways consequently it is well suited to a wide variety of applications for example in a companion paper cox ingersoll and ross 7 we use the model to develop a theory of the term structure of interest rates many studies have been concerned with various aspects of asset pricing under uncertainty the most relevant to our work are the important papers on intertemporal asset pricing by merton 19 and lucas 16 working in a continuous time framework merton derives a relationship among the equilibrium expected rates of return on assets he shows that when investment opportunities are changing randomly over time this relationship will include effects which have no analogue in a static one period model lucas considers an economy with homogeneous individuals and a single consumption good which is produced by a number of processes the random output of these processes is exogenously determined and perishable assets are defined as claims to all or a part of the output of a process and the equilibrium determines the asset prices our theory draws on some elements of both of these papers like merton we formulate our model in continuous time and make full use of the analytical tractability that this affords the economic structure of our model is somewhat similar to that of lucas however we include both endogenous production and

the term structure of interest rates with housing abstract this paper develops a general equilibrium model to study the link between the amount of capital invested in housing assets and the term structure of interest rates in the model the production of housing assets is irreversible and housing assets can be used as collateral for borrowing funds agents decisions about consumption and investments in housing and non housing assets generate a time varying market price of risk that drives the dynamics of the term structure the calibration to u s data using the simulated method of moments technique captures the dynamics of consumption and the short and long term interest rates

measuring direct discrimination in labor markets using a frontier approach evidence from cps female earnings data numerous studies of earnings differentials have attempted to measure discrimination against females or minorities by decomposing the total differential between males and females or whites and non whites into an explained and unexplained portion typically these studies follow the work of oaxaca 8 however a number of criticisms can be raised with these techniques 9 5 4 of which two are particularly important that the reduced form wage equations for the two groups will not be identical in every case and that there may be large and unobservable differences between the characteristics of the two groups for which the wage equations cannot account either of these problems are sufficient to make it impossible to use residual analysis to measure discrimination attempts to address these problems and obtain reliable and consistent estimates of the extent of discrimination are important for policy purposes low and villegas 7 address the first of these problems by suggesting the use of hedonic wage equations which contain only human capital characteristics or proxies and characteristics which directly affect the hedonic parameters in this framework perfect substitution between the workers is assumed their work however leaves the second problem unresolved in this paper a stochastic earnings frontier with a discrimination discount is used to estimate discrimination against women an earnings frontier for females that depends upon marginal productivity as measured by human capital and labor market characteristics of females is estimated discrimination is assumed to be the amount female earnings are removed from the frontier less any labor market inefficiency since these estimates will depend solely on female data they do not depend upon an assumption of similarity between males and females this procedure allows

a one factor model of interest rates and its application to treasury bond options 1990 a one factor model of interest rates and its application to treasury bond options financial analysts journal vol 46 no 1 pp 33 39

house prices borrowing constraints and monetary policy in the business cycle i develop a general equilibrium model with sticky prices credit constraints nominal loans and asset prices changes in asset prices modify agents borrowing capacity through collateral value changes in nominal prices affect real repayments through debt deflation monetary policy shocks move asset and nominal prices in the same direction and are amplified and propagated over time the financial accelerator is not constant across shocks nominal debt stabilises supply shocks making the economy less volatile when the central bank controls the interest rate i discuss the role of equity debt indexation and household and firm leverage in the propagation mechanism finally i find that monetary policy should not target asset prices as a means of reducing output and inflation volatility

uk wage underpayment implications for the minimum wage dynamic monopsony suggests that due to labour market frictions workers will be paid below their productivity this paper uses the stochastic frontier technique to estimate the degree of this underpayment for uk employees it finds evidence of significant underpayment the estimates are used to examine whether the predictions of dynamic monopsony are empirically accurate no conclusive evidence against this theoretical framework is found the paper also investigates whether payment according to productivity is a sufficient condition for the elimination of the working poor problem due to the existence of an unemployment barrier it finds that the minimum wage is not an effective anti poverty policy

employment and the introduction of a minimum wage in britain there has been and will continue to be a lot of controversy regarding the introduction of a minimum wage in britain much has been said about the economic effects of a minimum wage about the level at which it should or could be set about how other workers would be affected and about how a minimum wage may interact with the benefit system as the labour or liberal democrat parties will if they win the next election introduce a minimum wage it is evident that a clear and informed discussion of the economic effects is important most of the existing debate has concentrated on its impact on jobs and here the discussion varies from pure ideology to consideration of the statistical evidence the former is typified by the comments of a number of government ministers a recent example is that by ian lang the independent i3 september i995 who said that a minimum wage set at f4 i5 an hour would cost at least 950 000 jobs this comes from assuming large knock on effects from a minimum wage by asserting that the average worker would claim a pay increase of half the magnitude of the increase received by low paid workers when their pay is raised to the minimum and then that this wage increase has to transmit into job loss the qualitative prediction of job loss is of course entirely in line with orthodox models of the labour market which unambiguously predict that increases in minimum wages price workers out of jobs 1 it is also in line with the sentiments outlined in the recent oecd jobs study of i994 which stresses that minimum wages cause job loss in the member countries for example the jobs study argues that governments should ensure sufficient differentiation in wage rates by age and region to prevent the minimum wage from harming employment prospects for young people or low productivity regions oecd jobs study p 46 however a more recent body of work questions this conventional view quite a lot of empirical evidence has been accumulated in recent years that fails to find any evidence ofjob loss associated with minimum wages the emphasis seems to have shifted from how negative are the employment effects to is there an employment effect and in some circles what potential is there for a positive effect after a brief review of the history of minimum wages in britain we discuss this recent work in the next section of the paper on the

underpaid and overworked measuring the effect of imperfect information on wages this paper investigates the degree of shortfall between the wages workers earn and what they could earn assuming perfect or costless information in the labor market we use the stochastic frontier regression technique to estimate the degree of shortfall found in wages on an individual basis the paper tests in addition a number of hypotheses supplied by search theory in this context the results generally confirm the propositions from search theory and indicate that on the average worker wages fall short of worker potential wages by approximately 10 percent

exploiting the conditional density in estimating the term structure an application to the cox ingersoll and ross model we propose an empirical method that utilizes the conditional density of the state variables to estimate and test a term structure model with known price formulae using data on both discount and coupon bonds the method is applied to an extension of a two factor model due to cox ingersoll and ross 1985 cir our results show that estimates based on only bills imply unreasonably large price errors for longer maturities we reject the original cir model using a likelihood ratio test and conclude that the extended cir model also fails to provide a good description of the treasury market

policies and market factors driving wind power development in the united states abstract in the united states there has been substantial recent growth in wind energy generating capacity with growth averaging 24 percent annually during the past five years about 1700 mw of wind energy capacity was installed in 2001 while another 410 mw became operational in 2002 during 2003 development activity has remained strong with an estimated 1600 mw of capacity installed with this growth an increasing number of states are experiencing investment in wind energy projects currently about half of all states host at least one wind power project this paper explores the key factors at play in the 12 states in which a substantial amount of wind energy capacity has been developed or planned some of the factors that are examined include policy drivers such as renewable portfolio standards rps federal and state financial incentives as well as market drivers such as consumer demand for green power natural gas price volatility and wholesale market rules

a theory of the nominal term structure of interest rates a model of the nominal term structure of interest rates is developed that has a positive and stationary process for the interest rate and delivers closed form expressions for the prices of discount bonds and european options on bonds unlike the one state variable version of the cox ingersoll and ross 1985 model this model even in its one state variable version allows the term premium to change sign as a function of the state and the term to maturity and also allows for shapes of the yield curve that are observed in the u s data but that are disallowed in the cox ingersoll and ross model article published by oxford university press on behalf of the society for financial studies in its journal the review of financial studies

on alternative interest rate processes abstract in this paper alternative interest rate processes are estimated for denmark germany sweden and the uk using the generalized method of moments gmm in line with the study by chan karolyi longstaff and sanders 1992 on us data there seems to be a positive relation between interest rate level and volatility for some countries in contrast to their study it is found that mean reversion plays an important role for the specification of the interest rate dynamics the results seem to be robust to the use of different moment conditions and simulations of the estimated models reveal that they are fairly able to capture non fitted moments as well in addition there is evidence of a structural change in the danish interest rate process in august 1985 which may be due to a change in monetary policy the small sample properties of the gmm estimators are also studied through simulations

a residence time model of housing markets abstract this paper estimates a semi markov model of housing markets in which families move from one home to another spend a random amount of time in each home and choose whether to own or to rent at each move limiting conditions of the semi markov process are used to characterize the steady state frequency of owner occupied housing and to simulate the impact of changes in housing tax policy this approach differs markedly from previous studies of housing tax policy which focus on the entire population as opposed to the movers and ignore the effect of household residence times see king 1980 rosen 1979 white and white 1977 or laidler 1969 residence times further influence the analysis by affecting the relative cost of owning to renting in the tenure choice model homeowners pay legal and realtor fees at the time they move out of their homes which renters do not have to pay the discounted value of these fees declines with length of stay and provides a structural explanation of why families with longer residence times have a greater propensity to own results from the empirical analysis suggest that the semi markov model closely predicts conditions in the united states and provide important insights into the effects of housing tax policy residence times are also found to influence household tenure choice through their impact on the discounted legal and realtor fees paid by homeowners

did accelerated depreciation result in lower generation efficiencies for wind plants in india an empirical analysis abstract india ranks fifth in wind energy installations in the world with an installed wind capacity is 22 gw at the end of 2014 this has been made possible by a combination of federal financial incentives and state level feed in tariffs the federal policies are accelerated depreciation which allows for higher depreciations in earlier years and generation based incentive which provides a premium for each unit of generation accelerated depreciation appears to be more effective from deployment and cost perspectives whereas generation based incentive is said to be more effective in incentivizing generation in this paper using multivariable linear regressions on a sample of approximately 40 wind plants while controlling for wind regime and wind turbine technology we investigate the incremental impact of generation based incentive compared to accelerated depreciation we find that generation based incentive results in at least 3 percentage points higher plant load factors than accelerated depreciation this indicates that if higher generation is the goal of renewable policies generation based incentive should be preferred to accelerated depreciation this would be similar to the move from investment tax credit to production tax credit in the u s

cost effectiveness of renewable electricity policies we analyze policies to promote renewable sources of electricity a portfolio standard rps raises electricity prices and primarily reduces gas fired generation a knee of the cost curve exists between 15 and 20 goals for 2020 in our central case and higher natural gas prices lower the cost of greater reliance on renewables a renewable energy production tax credit lowers electricity price at the expense of taxpayers which limits its effectiveness in reducing carbon emissions and it is less cost effective at increasing renewables than a portfolio standard neither policy is as cost effective as a cap and trade policy for achieving carbon emission reductions

an equilibrium model of nominal bond prices with inflation output correlation and stochastic volatility a vector autoregressive var model is used to describe the joint dynamics of consumption growth and inflation the commonly used homoscedastic var is extended to allow for stochastic volatility driven by an unobservable autoregressive factor bond prices the conditional expectation of a function of these factors are approximated using tauchen s quadrature method we show that the mean variance and autocorrelation of yields is captured relatively well by the var sv model calibrated with inflation and consumption data the co dependents of consumption and inflation are shown to be important determinants for both real and nominal rates time variations in inflation volatility generate realistic variability of risk premia but unrealistically low average magnitudes copyright 1993 by ohio state university press

a parametric nonlinear model of term structure dynamics recent nonparametric estimation studies pioneered by ait sahalia document that the diffusion of the short rate is similar to the parametric function r superscript 1 5 estimated by chan et al whereas the drift is substantially nonlinear in the short rate these empirical properties call into question the efficacy of the existing affine term structure models and beg for alternative models which admit the observed behavior this article presents such a model our model delivers closed form solutions for bond prices and a concave relationship between the interest rate and the yields we show that in empirical analyses our model outperforms the one factor affine models in both time series as well as cross sectional tests article published by oxford university press on behalf of the society for financial studies in its journal the review of financial studies

on the job search some empirical evidence from britain abstract this paper considers evidence from the labour force survey concerning job search by employed workers the unconditional probability of observing on the job search is decomposed into the product of two constituent probabilities upon which maximum likelihood estimation is performed the analysis facilitates the identification of who searches and whether search takes place in work or from unemployment temporary or part time employment encourages continued search by men but not women skilled workers search more than the unskilled and demonstrate a preference for employed search inter industry wage relativities encourage search on the job job tenure is a significant determinant of the quality of a job match and the subsequent likelihood that on the job search is undertaken employed job seekers adopt search strategies that are more readily integrated into a working environment

state renewable energy electricity policies an empirical evaluation of effectiveness over the past decade state governments have emerged as us energy policy leaders across the country states are adopting policy instruments aimed at carbon mitigation and renewable energy deployment one of the most prevalent and innovative policy instruments is a renewable portfolio standard rps which seeks to increase the share of renewable energy electrification in the electricity market this analysis evaluates the effectiveness of state energy programs with an empirical investigation of the linkage between state rps policy implementation and the percentage of renewable energy electricity generation across states we use a variant of a standard fixed effects model referred to as a fixed effects vector decomposition with state level data from 1998 to 2006 results indicate that rps implementation is not a significant predictor of the percentage of renewable energy generation out of the total generation mix yet for each additional year that a state has an rps policy they are found to increase the total amount of renewable energy generation these findings reveal a potentially significant shortcoming of rps policies political institutions natural resource endowments deregulation gross state product per capita electricity use per person electricity price and the presence of regional rps policies are also found to be significantly related to renewable energy deployment