getting ppp right identifying mean reverting real exchange rates in panels abstract recent advances in testing for the validity of purchasing power parity ppp focus on the time series properties of real exchange rates in panel frameworks one weakness of such tests however is that they fail to inform the researcher as to which cross section units are stationary as a consequence a reservation for ppp analyses based on such tests is that a small number of real exchange rates in a given panel may drive the results in this paper we examine the ppp hypothesis focusing on the stationarity of the real exchange rates in up to 25 oecd countries we introduce a methodology that when applied to a set of established panel unit root tests allows the identification of the real exchange rates that are stationary our results reveal evidence of mean reversion that is significantly stronger as compared to that obtained by the existing literature strengthening the case for ppp

deviations from purchasing power parity in the long run this paper demonstrates that deviations from purchasing power parity reveal a remarkable and possibly startling consistency with martingale behavior during both fixed and flexible rate periods for a wide variety of countries and in both monthly and annual data since this pattern appears to be much more general than one would expect on the basis of models founded on international commodity arbitrage the paper proposes an alternative explanation which instead relies on financial arbitrage in bonds as the underlying mechanism this paper will demonstrate that deviations from purchasing power parity ppp reveal a remarkable and possibly startling consistency with martingale behavior during both fixed and flexible exchange rate periods for a wide variety of countries and in both monthly and annual data this pattern appears to be much more general than one would expect on the basis of models founded on international commodity arbitrage the paper therefore proposes an alternative explanation which does not presuppose free trade in goods but which instead relies on financial arbitrage in bonds as the underlying mechanism the major implication of the theory and the results is that ppp is as likely to be violated in the long as in the short run as an empirical matter deviations from ppp can be observed for most currencies at any instant see kravis et al 21 stockman 37 and genberg 15 among others these deviations are typically both cumulative and persistent the real exchange rate can remain on either side of parity for lengthy but variable time intervals of a year or more as a consequence the current consensus shared

environmental influences on mne subsidiary roles economic integration and the nordic countries we seek to examine the importance of environmental factors in determining mne subsidiary roles in particular we examine the environmental factors associated with deep integration schemes such as the eu such schemes require a convergence of economic structure due to the establishment of common regional institutions regulations and policies specifically we distinguish between the scope of activities performed by subsidiaries and the level of competence of those subsidiaries the empirical analysis is based on a large scale survey of foreign owned units in denmark finland and norway these nordic countries differ with regard to their eu membership status norway being the outsider while the others are members but are very similar to each other in most other respects our data show that subsidiaries in norway report significantly lower scores for both scope of activities and levels of competence the effects remain strong even when we are controlling for other potentially influential factors the findings indicate that being on the outside of the eu may indeed carry the price of becoming less attractive to mne activity

managing technological development lessons from the newly industrializing countries this survey looks at the technological development of the newly industrializing countries to draw some important lessons for firms and governments in other developing countries first inventing products and processes is not at the center of the technological development needed for successful industrialization it is at the fringe what is at the center is acquiring the capabilities needed for efficient production and investment second some countries have overemphasized the drive for technological self sufficiency and paid a high price in poor productivity what makes the best economic sense is to combine foreign and local technological elements and to do this in a way that progressively develops local capabilities in areas where they can be more efficient third the acquisition of technological capability does not come merely from experience though experience is important fourth the economic environment through its influence on the technological efforts of firms is very important in determining the productivity of a country s resources

innovation and productivity across four european countries nber working paper seriesinnovation and productivity across four european countriesrachel griffithelena huergojacques mairessebettina petersworking paper 12722http www nber org papers w12722national bureau of economic research1050 massachusetts avenuecambridge ma 02138december 2006we would like to thank laura abramovsky manuel arellano rupert harrison jordi jaumandreu elizabeth kremp pierre mohnen helen simpson the analysis contained in this paper was fundedby the european commission the esrc and esf under grant res 000 23 0901 and the advancedinstitute of management research aim all errors and omissions remain the responsibility of theauthors the views expressed herein are those of the author s and do not necessarily reflect the viewsof the national bureau of economic research 2006 by rachel griffith elena huergo jacques mairesse and bettina peters all rights reserved short sections of text not to exceed two paragraphs may be quoted without explicit permission providedthat full credit including notice is given to the source

technological capabilities and industrialization abstract this paper reviews the implications for industrial strategy of recent research on technological capabilities at the firm and national levels after exploring the nature and determinants of microlevel technological development a simple framework for explaining the growth of national capabilities is set out based on the interplay of incentives capabilities and institutions each may suffer market failure and so require corrective intervention the experience of some industrializing countries is described to assess the validity of this framework it is concluded that interventions carefully and selectively applied are necessary for industrial success

illegal immigration and resource allocation this paper studies the effects of illegal immigration and the associated expansion of the underground economy on the allocation of resources commodity prices and wages of workers both in the short run when occupational mobility is restricted and in the long run when the skill composition of the labor force is endogenous the paper goes on to consider some of the fiscal implications of illegal immigration and the related expansion of underground activity effects of sanctions against employers hiring illegal aliens and measures to legalize the status of clandestine foreign workers are also examined the geographical focus is on developed countries primarily the united states and europe excerpt

implications of immigration policies for the u s farm sector and workforce i background in 1942 the united states and mexico signed the bracero program a formal agreement to draw seasonal labor to work in u s agriculture which provided employment opportunities to poor rural mexicans 1 however this program was abolished in 1964 ending the legal seasonal labor supply to u s agriculture in the southwestern states concurrently the united states passed the immigration act of 1965 establishing a quota of 120 000 legal immigrants per year the abandonment of the bracero program the new legal immigrants quota limits and economic inequality between the united states and mexico paved the way for steady entry of illegal laborers and led to eventual insurmountable illegal immigration population in the united states because illegal immigration was not a serious problem in the 1960s and 1970s legislation addressed only the number of legal immigrants allowed to enter the united states but in the 1980s illegal immigration began to emerge as a national problem and extensive debates entrenched around issues such as preventing the entry of unauthorized workers providing public services to illegal immigrants and even legalizing these workers consequently the u s congress attempted to address the immigration problems by enacting the 1986 immigration reform and control act irca the goals of irca were to eliminate the stock of undocumented workers through amnesty 2 and domestic enforcement of employer sanctions and curb the influx of illegal immigrants by increasing the border surveillance amnesty failed to eliminate the stock of illegal immigrants because only about half of the illegal immigrants filed for citizenship and it created future expectation of amnesty and more illegal unauthorized entry furthermore domestic sanctions on employers of undocumented workers and deportation of these workers were scantly enforced to stop the influx of immigrants irca focused heavily on tightening border control the irca also legislated the h 2a program which allowed agricultural employers to bring in guest workers during seasonal operations ers 2007 however farmers complained that the cumbersome paperwork of h 2a and bureaucratic delay were not conducive to procure seasonal laborers at the time of peak farm operations such as vegetable and fruit picking 3 in spite of irca s amnesty provision and strengthened control measures illegal immigration continued to rise about 12 million unauthorized immigrants resided in the united states in 2007 martin 2007 which is reaffirmed by many popular press reports leading to an extended congressional debate that began at the start of this decade to solve the illegal immigration problem several bills were proposed by the house of representatives the senate and the white house addressing issues related to increased domestic and border enforcements 4 paths to citizenship and guest worker programs montgomery 2006 these bills were not passed because of major disagreements among lawmakers over providing citizenship and guest worker programs as a result of the failed legislations and the september 11 attack the government primarily focused on border security accordingly funding for border enforcement has steadily increased 5 and resources were diverted from domestic to border enforcement however boucher and taylor 2007 documented that increased funding to secure the border did not deter undocumented workers from crossing the border because determined immigrants eventually find a way to enter the country by repeated attempts following september 11 2001 the u s immigration and customs enforcement ice further decreased the number of human hours devoted to worksite inspection because monitoring critical infrastructure took priority gao 2005 for example from 1999 to 2003 the number of human hours for domestic enforcement decreased from 480 000 to 18 000 6 7 but by late 2005 the u

inflation real interest rates and the bond market a study of uk nominal and index linked government bond prices this paper estimates expected future real interest rates and inflation rates from observed prices of uk government nominal and index linked bonds the estimation method takes account of imperfections in the indexation of uk index linked bonds it assumes that expected log returns on all bonds are equal and that expected real interest rates and inflation follow simple time series processes whose parameters can be estimated from the cross section of bond prices the extracted inflation expectations forecast actual future inflation more accurately than nominal yields do the estimated real interest rate is highly variable at short horizons but comparatively stable at long horizons changes in real rates and expected inflation are strongly negatively correlated at short horizons but not at long horizons

illegal immigration a supply side analysis abstract this paper analyzes the supply side determinants of illegal immigration using a three sector general equilibrium model of the source country agricultural liberalization raises illegal immigration while liberalization of the high tech sector reduces it in contrast capital mobility in the source country renders trade policy ineffective for controlling illegal immigration paradoxically increased enforcement by the host country may raise source country unskilled wages although illegal immigration falls finally under capital mobility a rise in the source country restrictions on capital inflow raises the level of illegal immigration and reduces the effectiveness of border enforcement efforts by the host country

environmental management under subnational institutional constraints this study uses the institutional perspective to examine the interaction effects between the subnational institutional context and firm level parameters on corporate environmental behaviors based on a unique cross sectional data set of private firms compiled from three different sources in china our results suggest that both enforcement stringency of environmental regulations at the provincial level and private firms foreign ownership negatively affect compensation fees which are levies charged for firms emissions enforcement stringency also moderates the firm level relationship between foreign ownership and compensation fees but such a cross level moderating effect holds only for private firms with non hmt hong kong macau or taiwan investments

a multilevel analysis of innovation in developing countries innovation is a multilevel phenomenon not only characteristics of firms but also environment within which firms operate matter although this has been for long recognized in the literature a quantitative test that explicitly concerns the hypothesis that framework conditions affect innovativeness of firms remains lacking using a large sample of firms from many developing countries we estimate a multilevel model of innovation that integrates explanatory factors at different levels of the analysis apart from various firm s characteristics national economic technological and institutional conditions directly predict the likelihood of firms to innovate

the welfare effects of illegal immigration abstract this paper extends the work of ethier on illegal immigration by examining the optimal level of enforcement for the labor importing country in a two country model and by considering the effects of allowing capital mobility we derive a formula for the optimal level of enforcement against firms that hire illegal workers and show that the presence of enforcement costs makes the policy less efficient than a wage tax with capital mobility foreign workers gain from an increase in enforcement in the home country because capital is driven out of the home country

innovation and industry evolution the theoretical literature on innovation has been concerned with a single innovation produced by a number of identical agents by contrast we consider a market in which one firm is the current incumbent while the remaining firms are challengers moreover we consider a sequence of innovations so that success does not imply that the successful firm reaps monopoly profits forever after but only until the next better innovation is developed we begin with a fully optimizing behavioral model and derive the equivalent of the schumpeterian process of creative destruction that is a firm enjoys temporary monopoly power but is soon overthrown by a more inventive challenger the essential point to grasp is that in dealing with capitalism we are dealing with an evolutionary process the fundamental impulse that sets and keeps the capitalist engine in motion comes from the new consumers goods the new methods of production or transportation the new markets the new forms of industrial organization that capitalist enterprise creates schumpeter 1942 pp 82 83

the impact of immigration enforcement on the u s farming sector this paper examines the eects of state and local immigration enforcement eorts on the u s farming sector we use variation in enforcement eorts generated by the timing of adoption of 287 g programs by state and county law enforcement agencies allowing local ocers

a re assessment of the relationship between real exchange rates and real interest rates 1974 1990 abstract this paper uses cointegration techniques and error correction models to re examine the link between real exchange rates and real interest rate differentials the results show that real exchange rates and real interest rates are nonstationary however they are not cointegrated with each other on the other hand the dynamic models indicate that there might be a long run relationship between these variables but this cannot be verified the final conclusion is that there is little empirical evidence in support of a systematic relationship and this result is robust across exchange rates time periods and measures of expected inflation

innovation appropriability and the underpricing of initial public offerings using the information asymmetries theory of underpricing we investigate the role of innovation in the underpricing of initial public offerings ipos we develop and test a model in which patents reduce information asymmetries in industries where the link between patents and inventive returns is transparent thereby reducing underpricing conversely patents reflect increased information asymmetries and underpricing in industries where the link is not transparent we examine these relationships in a sample of 1 413 ipos and find strong support for our hypotheses in so doing we make an important theoretical contribution by showing that the ipo market contextualizes firm information abstract from author copyright of academy of management journal is the property of academy of management and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder s express written permission however users may print download or email articles for individual use this abstract may be abridged no warranty is given about the accuracy of the copy users should refer to the original published version of the material for the full abstract copyright applies to all abstracts

u s mexican trade in winter vegetables and illegal immigration this paper presents an integrated approach to u s mexican trade in a labor intensive commodity fresh winter tomatoes and illegal immigration of agricultural labor a seven equation econometric model is developed that includes excess demand u s import and supply mexican export equations for fresh winter tomatoes u s demand and mexican supply equations for apprehensible individuals intercountry price and wage relationship equations and a u s border patrol apprehension effort equation the empirical results indicate that both u s and mexico economic conditions affect the number of apprehended illegal mexican aliens the results also indicate that immigration and trade policies affect apprehensions

illegal immigration border enforcement and relative wages evidence from apprehensions at the u s mexico border we examine illegal immigration in the united states from mexico over the period 1976 1995 one challenge is that we do not observe the number of individuals that attempt to enter the united states illegally we only observe the number of individuals apprehended attempting to cross the u s mexico border illegally based on a simple migration model we postulate the existence of an apprehensions function which expresses apprehensions at the border as a function of illegal attempts to cross the border and u s border enforcement effort we find that a 10 decrease in the mexican real wage leads to a 7 5 to 8 8 increase in apprehensions at the border excerpt

an international multilevel analysis of product innovation this paper studies multilevel determinants of product innovation by incumbent firms with data from 68 countries covering over 25 000 firms in eight manufacturing sectors the author assesses the predictions of interdisciplinary research on firm behavior in different contexts which have emphasized that product innovation is affected by three sets of factors the extent of global engagement information spillovers and market structure the empirical model of the probability of observing a product innovation a probit model by a firm considers three levels of analysis firm characteristics industry characteristics and the national context the econometric evidence supports the global engagement and information spillovers hypotheses but the evidence on the role of market structure is mixed regarding global engagement the evidence suggests that product innovation by incumbent firms is positively correlated with the act of investing in r d and licensing of foreign technologies and country level average import tariffs reduce the probability of product innovation regarding information spillovers the evidence also shows that a country s patent density is positively correlated with product innovation in contrast concerning the market structure hypotheses country level indicators of business density and of policy induced costs of entry are not robustly correlated with product innovation

illegal aliens unemployment and immigration policy abstract this paper develops a simple two country model of illegal immigration in an attempt to examine the interaction among variables such as the stock of migrant labor the unemployment rates of the two economies and the rate of spending by the host country on the enforcement of its immigration restrictions the focus of the analysis is on the dynamics of immigration policy and on its role in determining the nature of the mechanism by which disturbances to the labor market of one country are transmitted to that of the other in the short run and in the long run

market liberalization and firm performance during china s economic transition this paper examines the impact of market liberalization on firm performance through institutional changes during the economic reform in china the conceptualization focuses on the decentralization of control ownership restructuring and industrial policy as the primary institutional changes to implement market liberalization in china these institutional changes affect firm performance by shaping managerial incentives affecting transaction and agency costs and making selective resource allocations across and within industries using a large scale data set including 23 577 firms between 1992 and 1996 the study examines how market liberalization affects the profitability and productivity of chinese firms and the relationship between ownership change and the performance of state owned enterprises

economic development as self discovery in the presence of uncertainty about what a country can be good at producing there can be great social value to discovering costs of domestic activities because such discoveries can be easily imitated we develop a general equilibrium framework for a small open economy to clarify the analytical and normative issues we highlight two failures of the laissez faire outcome there is too little investment and entrepreneurship ex ante and too much production diversification ex post optimal policy consists of counteracting these distortions to encourage investments in the modern sector ex ante but to rationalize production ex post we provide some informal evidence on the building blocks of our model

accounting for innovation and measuring innovativeness an illustrative framework and an application the purpose of this paper is to propose and illustrate an accounting framework for innovation we characterize the intensity of innovation by a sales weighted measure of innovation the share of sales in innovative products but other output indicators of innovation could be considered as well comparing statistics on the share of innovative sales across countries industries or firms measures but does not explain the intercountry interindustry or interfirm differences in innovation intensity to have a more meaningful basis of comparison we need a model if an exact model of innovation in its various dimensions existed and if we knew it we would be able to understand fully why innovation differs among countries industries or firms of course such a model does not exist nevertheless it is worth trying to account for innovation differences if only very roughly in such an endeavor what remains to be explained is as important to consider as what can be explained because it reflects the extent of innovative ability or capacity or innovativeness to motivate our approach better and make it more explicit we find it appealing to draw a comparison with the standard framework for growth accounting and the underlying model of a production function production output is viewed as resulting from a process of transformation of inputs into output that can be represented and analyzed in terms of a production function based on the production function an accounting framework can be constructed in which changes in output between periods years decades or differences between spatial units firms industries countries are ascribed to changes or differences in the inputs and in a residual that is known as total factor or multifactor productivity tfp or mfp or simply productivity likewise innovation output can be viewed as resulting from innovation inputs such as r d efforts and other contextual determinants such as the pressure of competition this linkage can be represented in terms of an innovation function and an innovation accounting framework on the basis of which changes in innovation output between periods or differences between spatial units can be ascribed to changes or differences in the factors of innovation and in a residual that we call innovativeness or the unexplained ability to turn innovation inputs into innovation output innovativeness is thus to innovation what tfp is to production innovativeness is conditional on a model of an innovation function and a set of factors of innovation just as tfp is conditional on an assumed specification of the production function and measured factors of production both correspond to omitted factors of performance such as technological organizational cultural or environmental factors and to other sources of misspecification errors although tfp is commonly interpreted as being mainly an indicator of technology the produc

extracting inflation from stock returns to test purchasing power parity relative purchasing power parity ppp holds for pure price inflations which affect prices of all goods and services by the same proportion while leaving relative prices unchanged pure price inflations also affect nominal returns of all traded financial assets by exactly the same amount recognizing that relative ppp may not hold for the official inflation data constructed from commodity price indices because of relative price changes and other frictions that cause prices to be sticky we provide a novel method for extracting a proxy for realized pure price inflation from stock returns we find strong support for relative ppp in the short run using the extracted inflation measures

the regulation of labor author s botero juan djankov simeon la porta rafael lopez de silanes florencio shleifer andrei abstract we investigate the regulation of labor markets through employment collective relations and social security laws in 85 countries we find that the political power of the left is associated with more stringent labor regulations and more generous social security systems and that socialist french and scandinavian legal origin countries have sharply higher levels of labor regulation than do common law countries however the effects of legal origins are larger and explain more of the variation in regulations than those of politics heavier regulation of labor is associated with lower labor force participation and higher unemployment especially of the young these results are most naturally consistent with legal theories according to which countries have pervasive regulaory styles inherited from the transplantation of legal systems

a technology gap approach to why growth rates differ abstract this paper contains a discussion and test of the technology gap approach to development and growth the basic hypotheses of the theory are tested on pooled cross sectional and time series data for 25 industrial countries for the period 1960 1983 the sample includes in addition to 19 oecd countries 6 of the most important industrial economies from the non oecd area the findings of the paper confirm that there exists a close correlation between the level of economic development measured as gdp per capita and the level of technological development measured through r d or patent statistics furthermore for the group of 25 countries as a whole technology gap models of economic growth are found to explain a large part of the actual differences in growth rates both between countries and periods as expected both the scope for imitation growth in innovative activity and efforts to narrow the gap investment appear as powerful explanatory factors of economic growth however when the non oecd countries and later usa and japan are removed from the sample the explanatory power of the technology variables especially growth in innovative activity diminishes

the effect of cultural distance on entry mode choice international diversification and mne performance a meta analysis although a growing literature indicates that cultural distance that is differences between national cultures is an important determinant of organizational actions and performance both empirical and theoretical concerns abound in this study the relationships of cultural distance with entry mode choice international diversification and mne performance are examined by meta analyzing data from 66 independent samples with cumulative sample sizes ranging from 2 255 to 24 152 regression results failed to provide statistical evidence of significant relationships between cultural distance and entry mode choice international diversification and mne performance the examination of moderator effects however yielded important results we found a strong negative association between cultural distance and entry mode choice for us based mnes the cultural distance international diversification relationship was negative for high technology industries while it was positive for other industries cultural distance also had a strong positive effect on mne performance for developed country investments a similar strong positive relationship was found between cultural distance and international diversification in studies with more recent samples results of this study indicate that substantial additional research is needed before the role of cultural distance is fully understood

industry returns and the fisher effect we investigate the cross sectional relation between industry sorted stock returns and expected inflation and we find that this relation is linked to cyclical movements in industry output stock returns of noncyclical industries tend to covary positively with expected inflation while the reverse holds for cyclical industries from a theoretical perspective we describe a model that captures both i the cross sectional variation in these relations across industries and ii the negative and positive relation between stock returns and inflation at short and long horizons respectively the model is developed in an economic environment in which the spirit of the fisher model is preserved the fisher model states that expected nominal rates of return on assets should move one for one with expected inflation this belief is generally attributed to irving fisher s 1930 work on interest rates in particular to his view that the real and monetary sectors are causally independent in an apparent contradiction to the fisher hypothesis however it is a common empirical finding that stock returns are negatively related to both expected and realized inflation 1 this negative correlation is especially surprising for stocks which as claims against real assets should compensate for movements in inflation we provide two main contributions to the existing literature on the relation between stock returns and inflation the first contribution of the article is to provide a theoretical description of the cross sectional relation between stock returns and expected inflation we describe an asset pricing model that predicts cross sectional variation in the coefficients of expected inflation across various industry portfolios an interesting feature of the model is that it synthesizes some of the more palatable features of existing explanations of the negative relation between inflation and returns of special interest is the development of the model in a money neutral world so that the basic premise underlying fisher s work is maintained since most theoretical models of the

us immigration policies and dynamics of cross border workforce in agriculture given the contentious debate on immigration this study develops a dynamic model to analyse the effects of stricter border and domestic enforcement and streamlining the guest worker programme on cross border migration from mexico employment and production in us labour intensive and mexican agriculture and the us and mexican wage rates the model incorporates labour leisure decisions of mexican workers and labour market dynamics and linkages the findings show stricter border and domestic controls exacerbate the labour shortage problems and reduce the us agricultural production streamlining the guest worker programme provides a steady supply of farm workers and has negligible impact on the us wage

a model of exchange rate dynamics this model treats the exchange rate as an asset price that depends on expectations concerning exogenous real and monetary factors that will affect relative prices and absolute price levels in future periods changes in exchange rates reflect both expected changes in these exogenous factors and changes in expectations occasioned by new information the model explains the random component in exchange rate behavior the source of divergences from purchasing power parity the anticipatory response of exchange rates to future expected disturbances and the causes of exchange rate overshooting

small menu costs and large business cycles a macroeconomic model of monopoly i introduction the conflict between modern neoclassical and traditional keynesian theories of the business cycle centers upon the pricing mechanism in neoclassical models prices are fully flexible they represent the continuous optimization of economic agents and the continuous intersection of supply and demand in keynesian models prices are often assumed to be sticky they do not necessarily equilibrate all markets at all times one of the reasons for the resurgence of the equilibrium approach to macroeconomics has been the absence of a theoretical underpinning for this keynesian price stickiness this note shows that sticky prices can be both privately efficient and socially inefficient the business cycle results from the suboptimal adjustment of prices in response to a demand shock to the extent that policy can stabilize aggregate demand it can mitigate the social loss due to this suboptimal adjustment in some keynesian models prices are simply exogenously fixed 2 in others agents must set their prices in advance of the transaction date the act of altering a posted price is certainly costly these costs include such items as printing new catalogs and informing salesmen of the new price yet these menu costs are small and therefore generally perceived as providing only a weak foundation for these fixed price models however this inference is flawed small menu costs can cause large welfare losses the claim that price adjustment costs are small does not rebut the claim that they are central to understanding economic fluctuations

foreign aid and illegal immigration abstract we develop a two country model of illegal immigration we analyse the effect of foreign aid on illegal immigration and consider both exogenous and endogenous income repatriation in the former an increase in aid increases illegal immigration if the total amount of aid is small a transfer of resources from border control to aid increases illegal immigration when the total amount of aid is small under endogenous income repatriation aid has no effect on illegal immigration when the preferences of the immigrants and their family members are the same if the preferences are different aid may increase illegal immigration

complementarities in innovation policy this paper develops a framework for testing discrete complementarities in innovation policy using european data on obstacles to innovation we propose a discrete test of supermodularity in innovation policy leading to a number of inequality constraints we apply our test to two types of innovation decisions to innovate or not and if so by how much we find that the evidence regarding the existence of complementarity in innovation policies depends on the phase of innovation that is targeted getting firms innovative or increasing their innovation intensity as well as on the particular pair of policies that is being considered the two phases of the innovation process i e the probability of becoming an innovator and the intensity of innovation are subject to different constraints interestingly there seems to be a need to adopt a package of policies to make firms innovate while a more targeted choice among policies is necessary to make them more innovative

testing the relative purchasing power parity hypothesis the case of korea abstractthis study examines the relative purchasing power parity ppp hypothesis using the data from the korean won us dollar and the korean won japanese yen foreign exchange markets we extract proxies for inflation from stock market returns of korea the united states and japan based on the method used by chowdhry roll and xia in 2005 we explicitly test the relative ppp hypothesis in light of the short run price volatility using monthly bimonthly and quarterly data from 1 january 1998 to 31 december 2012 our findings suggest that the empirical test results from the entire sample period do not support the relative ppp hypothesis however the results from the sample period excluding the asian financial crisis period show that the relative ppp hypothesis holds for the korean won us dollar market with a moderate magnitude of inflation impact but not for the korean won japanese yen market abrupt changes in exchange rates during the crisis period may have affected the relationship between inflation an