sps and tbt agreements and international agricultural trade retaliation or cooperation in this article we investigate whether the brazilian notifications to the tbt and sps agreements are characterized as retaliation or as cooperation in international agricultural trade in the period 1996 2008 a generalized method of moments gmm model is used to estimate game models of bilateral trade between brazil and its major partners united states european union and japan from the viewpoint of strategic games the results suggest that the brazilian notifications are forms of retaliation against the united states and regarding the european union the best result for brazil was conciliation on the other hand if the results are interpreted as equilibria of bargaining games they suggest that brazil has great bargaining power in trade with the united states and that cooperation characterized agricultural trade between brazil and the european union in the period analyzed in the case of agricultural trade between brazil and japan only japan has characteristics of a country with significant bargaining power

trade policy of a free trade agreement in the presence of foreign lobbying abstract this paper studies the effect of foreign lobbies on trade policy of a country which is a member of a free trade agreement fta it uses a monopolistically competitive political economy model in which the government determines external tariffs endogenously the effect of foreign lobbying under the fta is examined empirically using canadian industry level trade data that allow differentiating of lobby groups by the country of origin the analysis suggests that the presence of foreign lobbying has a significant effect on the domestic trade policy the heterogeneity of foreign lobbies is also important the presence of an organized lobbying group in an fta partner country tends to raise trade barriers while an organized lobbying group of exporters from outside of the fta is associated with less protection

is protection for sale evidence on the grossman helpman theory of endogenous protection grossman and helpman 1994 present a theory of endogenous protection by explicitly modeling government industry interactions for which mere black box models previously existed they obtain a ramsey pricing type solution to the provision of protection which emphasizes the role of inverse import penetration ratios and import elasticities on the lobbying side the model makes predictions about lobbying competition and lobbying spending according to deadweight costs from protection the model not only makes for richer theory in terms of rigor and elegance but its predictions are directly testable whether the grossman helman model stands up to real world data is investigated in this paper predictions from both the protection side and lobbying side are tested using cross sectional u s nontariff barrier data we also compare the second generation grossman helpman model with a more traditional specification our results call for serious consideration of this model in the political economy literature

trade liberalization antidumping and safeguards evidence from india s tariff reform abstract this paper is the first to use product level data to examine empirically whether countries use antidumping and safeguard exceptions to unwind commitments to lower tariffs in the face of domestic political economic pressure we focus on the case of india a country that underwent a major exogenous tariff reform program in the early 1990s and subsequently initiated substantial use of safeguard and antidumping import restrictions we first estimate structural determinants of india s import protection using the grossman and helpman 1994 model and provide evidence from its pre reform tariff data of 1990 that is consistent with the theory we then re estimate the model on the indian tariff data after the trade liberalization is complete and find that the model no longer fits a result consistent with theory and evidence provided in other settings that india s 1991 1992 imf arrangement can be interpreted as resulting in an exogenous shock to india s tariff policy however when we re estimate the model on data from 2000 2002 that more completely reflects india s cross product variation in import protection by including both its post reform tariffs and its additional non tariff barriers of antidumping and safeguard import protection the significance of the grossman and helpman model determinant estimates is restored we interpret these combined results as evidence that india unwound its commitment to reduce tariffs through use of antidumping and safeguard protection in the face of political economic pressure the estimates are also economically important and provide one explanation for separate results in the literature that the magnitude of import reduction associated with india s use of antidumping is similar to the initial import expansion associated with its tariff reform finally we interpret the implications of our results for the burgeoning research literature examining the effects of liberalization on india s micro level development

academic earmarks and the returns to lobbying abstract in this paper we estimate the returns to lobbying by universities to motivate our empirical work we develop a simple theoretical model of university lobbying for academic earmarks our statistical analysis shows that universities represented by a house appropriations committee hac or senate appropriations committee sac member spend less money on lobbying than those that are not represented in addition using instrumental variables estimations we show that universities without hac or sac representation may receive some benefit to lobbying for earmarks although in many estimations this benefit is not statistically different from zero however for universities with hac or sac representation a 10 percent increase in lobbying yields an additional 2 8 percent or 3 5 percent increase in earmarks respectively this suggests that there are large returns to lobbying for academic earmarks if a university is represented by a member of one the hac or sac but little or no return if not

the political economy of opec abstract we develop a conceptual model that captures opec pricing behavior and apply it to explain the large gap observed between domestic fuel prices in opec countries and prices in the rest of the world we model opec as a cartel of nations not firms and assume that politicians use two instruments production quotas and domestic fuel consumption subsidies the cartel of nations model suggests that introduction of alternatives to petroleum products may lead opec to reduce exports and increase domestic fuel consumption the empirical analysis suggests that when opec sets production quotas it places similar weights on consumer and producer surplus but when opec countries set domestic fuel subsidies on average 6 more weight is given to consumer surplus with some of the opec countries pursuing very aggressive domestic cheap fuel policies

endogenous trade policy through majority voting an empirical investigation abstract the median voter approach to trade policy determination within a heckscher ohlin framework as in mayer am econ rev 74 5 1984 970 predicts that an increase in inequality holding constant the economy s overall relative endowments raises trade barriers in capital abundant economies and lowers them in capital scarce economies we find support for this prediction using cross country data on inequality capital abundance and diverse measures of protection we perform certain robustness checks that include controlling for the effects of political rights and schooling as well as using alternative datasets on factor endowments

environmentalism democracy and pollution control this paper makes two empirical contributions to the literature based on predictions generated by a lobby group model first we investigate how environmental lobby groups affect the determination of environmental policy in rich and developing countries second we explore the interaction between democratic participation and political electoral competition the empirical findings suggest that environmental lobby groups tend to positively affect the stringency of environmental policy moreover political competition tends to raise policy stringency in particular where citizens participation in the democratic process is widespread

the clash of liberalizations preferential versus multilateral trade liberalization in the european union there has been an explosion in the number of preferential trade agreements in the past decade preferential trade agreements are characterized by liberalization with respect to only a few partners and thus they can potentially clash with and retard multilateral trade liberalization despite this important concern with preferential trade agreements there is almost no systematic evidence on whether they actually affect multilateral trade liberalization the authors model the effect of preferential trade agreements on multilateral trade liberalization and show that preferential trade agreements slow down multilateral trade liberalization unless they have a common external tariff and allow for internal transfers next they use detailed data on product level tariffs negotiated by the european union in the past two multilateral trade rounds to structurally estimate their model the authors confirm the main prediction the european union s preferential trade agreements have clashed with its multilateral trade liberalization and find that the effect is quantitatively significant moreover they also confirm several auxiliary predictions of the model and provide new evidence on the political economy determinants of multilateral liberalization in the european union

protection for sale the case of oligopolistic competition and interdependent sectors in grossman helpman s 1994 canonical protection for sale pfs model political competition among industry lobbies is driven purely by their interests as consumers this paper introduces demand linkages and oligopolistic competition into the pfs framework to address the rivalry among lobbies stemming from product substitutability it shows that increased substitutability weakens the interest groups incentives to lobby and reduces tariff distortions this may explain why empirical tests of pfs find surprisingly little impact of lobbies on the government s trade policy decision the paper also analyzes endogenous lobby formation suggesting that demand linkages may adversely affect the industry decision to organize resume proteger les ventes le cas de la concurrence oligopolistique et des secteurs interdependants dans le modele canonique de grossman helpman 1994 protection for sale pfs la concurrence politique entre lobbyistes est purement alimentee par leurs interets en tant que consommateurs ce texte presente dans ce cadre d analyse les enchainements de la demande et la concurrence oligopolistique pour prendre en compte la rivalite entre lobbyistes qui derive de la substituabilite des produits on montre qu une substituabilite accrue reduit l incitation des groupes d interets a faire du lobbying et reduit les distorsions tarifaires cela peut expliquer pourquoi les tests empiriques du modele pfs ont decouvert un impact etonnamment faible des lobbies sur les decisions des gouvernements dans le monde des politiques commerciales le texte analyse aussi la formation endogene des lobbies suggerant que les enchainements de la demande peuvent affecter negativement la decision de s organiser

rain agriculture and tariffs this paper examines whether and how rainfall shocks affect tariff setting in the agricultural sector in a model of strategic trade policy the authors show that the impact of a negative rainfall shock on optimal import tariffs is generally ambiguous depending on the weight placed by the domestic policy maker on tariff revenue profits and the consumer surplus the more weight placed on domestic profits the more likely it is that the policy maker will respond to a rainfall shortage by reducing import tariffs these findings are robust to alternative assumptions about market structure and the timing of the game using detailed panel data on applied tariffs and rainfall for 70 nations the authors find robust evidence that rainfall shortages generally induce policy makers to set lower tariffs on agricultural imports

preferential versus multilateral trade liberalization and the role of political economy abstract in this paper we analyze the effect of the freedom to pursue preferential trade liberalization permitted by article xxiv of the gatt on country s incentives to participate in multilateral negotiations and on feasibility of global free trade we present a model in which countries choose whether to participate in preferential or multilateral trade agreements under political pressures from domestic special interest groups we show that heterogeneity in political preferences across countries plays an important role in determining the relative merits of preferential and multilateral approaches to trade liberalization on one hand the opportunity to liberalize preferentially may be necessary to induce countries with strong political motivations to participate in multilateral free trade negotiations on the other hand when countries share similar political preferences multilateral free trade that would have been politically supported otherwise becomes unattainable if countries can pursue preferential liberalization

auctions or grandfathering the political economy of tradable emission permits despite the prevalence of grandfathered permits we still observe that a hybrid policy in which a fraction of initial emission permits is distributed through auctions is adopted in some cases we also observe that some polluting industries support auctioned permits and that most environmental groups support grandfathered permits this paper attempts to explain these phenomena from the perspective of political economy and investigates the conditions under which grandfathering auctions or a hybrid instrument will be the equilibrium policy by constructing a two stage lobbying game in which the type of policy instrument auction grandfathering or a hybrid instrument is determined in the first stage and then the number of permits is decided in the second stage we highlight the strategic interaction of the lobbying activities between the two stages in explaining the behavior of the lobbying groups

protection for sale an empirical investigation comment do contributions levels matter for endogenous protection or is the existence of a lobby sufficient are lobbies net benefits from protection identical to their contribution levels or does the level of protection simply reflect contribution levels of supporters and opponents we estimate the influence driven grossman and helpman 1994 and the tariff function findlay and wellisz 1982 models within a unified theoretical framework to examine the contrasting implications derived from these two prominent tariff formation models we find strong evidence that protection is indeed for sale the important new result is however that not only the existence of lobbies matters but also the relative size of the sectoral pro and anti protection contributions using j tests to compare the power of the models directly we cannot reject the null of correct specification of the influence driven model and find evidence of some misspecification in the tariff function model

are global trade negotiations behind a fragmented world of gated globalization abstract we show that global trade negotiations can prevent global free trade in a simple model where global tariff negotiations precede sequential free trade agreements ftas we show fta formation can expand all the way to global free trade in the absence of global tariff negotiations but global free trade never emerges when global tariff negotiations precede fta formation this result arises precisely because global tariff negotiations successfully elicit concessions from negotiating countries moreover global tariff negotiations can produce a fragmented world of gated globalization where some countries form ftas that eliminate tariff barriers among themselves while outsiders continue facing higher tariffs

policy influence and private returns from lobbying in the energy sector in this article i quantify the extent to which lobbying expenditures by firms affect policy enactment to achieve this end i construct a novel dataset containing all federal energy legislation and lobbying activities by the energy sector during the 110th congress i then develop and estimate a game theoretic model where heterogeneous players choose lobbying expenditures to affect the probability that a policy is enacted i find that the effect of lobbying expenditures on a policy s equilibrium enactment probability to be statistically significant but very small nonetheless the average returns from lobbying expenditures are estimated to be over 130

union membership in the united states 1973 1981 this paper reports estimates of union membership gathered from may current population surveys from 1973 to 1981 the authors present data by occupation industry selected states and smsas race gender and educational attainment the paper both extends and differs from that by freeman and medoff which presents unionism estimates for the private sector for 1968 75 to facilitate longitudinal analysis this paper reports three year moving averages of occupational and industry data and annual estimates of demographic classifications the data include public sector as well as private sector workers and they exclude workers not covered by the national labor relations act also the authors provide only union membership estimates not estimates on workers covered by union contracts this paper suggests that the percentage of all workers that are unionized in the united states remained fairly constant over the 1973 81 period

import protection business cycles and exchange rates evidence from the great recession this research estimates the impact of macroeconomic fluctuations on import protection policies over 1988 q1 2010 q4 for five industrialized economies the united states european union australia canada and south korea there is evidence of a strong countercyclical trade policy response in the pre great recession period of 1988 q1 2008 q3 during which increases in domestic unemployment rates real appreciations in bilateral exchange rates and declines in the gdp growth rates of bilateral trading partners led to substantial increases in new temporary trade barriers it then applies this pre great recession empirical model to realized macroeconomic data from 2008 q4 2010 q4 and find it predicts a surge of new import protection during the great recession e g for the us and eu the model predicts new trade barriers would cover an additional 15 percentage points of nonoil imports well above the baseline level of 2 3 percent of import coverage immediately preceding the crisis finally the research examines why the realized trade policy response differed from model predictions while exchange rate movements played an important role in limiting new import protection during the great recession there is also evidence of one particularly important change in trade policy responsiveness i e in this period governments refrained from imposing new temporary trade barriers against foreign trading partners experiencing their own weak or negative economic growth

reconsidering the empirical evidence on the grossman helpman model of endogenous protection the emergence of the grossman and helpman 1994 model of endogenous protection as the preeminent model in the political economy of trade literature has been significantly advanced by the finding that its predictions about the cross industry pattern of protection are broadly consistent with the data however in their empirical implementation of the grossman helpman model researchers have assumed the presence of multiple policy instruments and extraneous political factors we argue that incorporating these assumptions into the theory significantly changes its predictions about the cross industry pattern of protection jel classification f1 l emergence du modele de protection endogene de grossman helpman en tant que modele le plus important dans la litterature sur l economie politique du commerce international a ete confirmee de maniere significative quand on a decouvert que ses predictions quant au pattern de protection a travers les industries se trouvaient generalement confirmees par les donnees cependant dans leur verification empirique du modele de grossman helpman les chercheurs ont postule la presence de multiples instruments de politique publique et de certains facteurs politiques on suggere que l ajout de ces postulats change de maniere significative les predictions du modele quant au pattern de protection dans les divers secteurs

the role of importers and exporters in the determination of the u s tariff preferences granted to latin america abstract this paper investigates the role played by domestic importers and foreign exporters in improving preferential access to the domestic market to this end the framework used in this paper extends the protection for sale analysis to explicitly model the role of domestic importers and foreign exporters in the determination of preferential trade treatment the predictions of the model are tested using data on preferential trade between the united states and latin american countries the results suggest that latin american exporters and us importers lobbying efforts have a significant and important role in determining the extent of preferential access granted by the united states more interestingly these findings also show that u s importers capture a very substantial share of the rents generated by tariff preferences these results therefore shed a pessimistic view on preferential trade schemes as a reliable source of gains for developing countries

us non tariff barriers as privately provided public goods abstract the endogenous theory of protection is empirically investigated in a different light rather than emphasizing the determinants of the supply of protection the present study emperically investigates the micro level demand side behavior of firms predictions from bergstrom et al journal of public economics 1986 2 25 49 about the private provision of public goods provide a theoretical foundation for such a demand side econometric investigation if rational lobbies are observed to behave in a manner consistent with the theory of the private provision of public goods then it must be the case that they are able to influence trade policy the econometric specification is also consistent with the special interest models of olson the logic of collective action public goods and the theory of groups harvard university press 1965 stigler bell journal of economics and management science 1971 2 137 146 baron quarterly journal of economics 1989 1 45 72 and grossman and helpman american economic review 1994 84 833 850 hence evidence presented in this study from the demand side behavior of firms has the deeper implication that it validates the theory of endogenous protection an issue that is still controversial among trade theorists

economic reform voting and local political intervention evidence from india abstract this paper uses the indian tariff reforms of the early nineties to estimate how voters hurt by economic reforms respond regions more hurt by the tariff reform increased their support for both the party that initiated their suffering and parties with similar preferences in favor of poverty centric policies this response is surprisingly sophisticated where voters did not simply punish incumbents for negative income shocks and correctly discounted initial anti reform stances by opposition parties that later turned out to be false furthermore the strength of this voting response varied with both geography and local political incentives suggesting that the economic effects of reforms might vary substantially in large and decentralized democracies

an evaluation of the installation of solar photovoltaic in residential houses in malaysia past present and future abstract this paper examines solar energy development in malaysia particularly in relation to the installation of solar photovoltaic pv in residential houses it analyzes the past activities related to solar energy in malaysia in terms of research and developments r ds the implementations used as well as the national policies for the past 20 years which have pushed the installation of pv in the country the feed in tariff fit scheme is discussed showing comparative cost benefit analysis between the pv installation in houses in the united kingdom uk and malaysia and with other investment schemes available in malaysia to investigate the awareness of renewable energy policies and incentives a preliminary survey of the public opinion in malaysia has been carried out and an evaluation of public willingness to invest in the fit scheme by installing the pv on their houses is presented the cost benefit analysis shows that the proposed fit programme is capable of generating good return on investment as compared to the one in the uk but the return is lower than other investment tools the survey suggests that most malaysians are unaware of the government s incentives and policies towards renewable energies and are not willing to invest in the fit scheme

the economics of special interest politics the case of the tariff this paper investigates the interaction of politicians and special interest lobbies the goal is to model the equilibrium levels of redistributive policies such as taxes subsidies tariffs and regulatory decisions the model is applied throughout to the setting of tariffs by contributing to political campaigns special interest lobbies generate economic returns higher tariffs generate revenue for import competing industries through higher product prices higher milk support prices raise dairy farm income and so forth the lobby invests to maximize these net economic returns in evaluating their chances of election politicians weigh the favorable effects of special interest money against the unfavorable association with the lobby and the social cost of the redistributive policy section i explores the lobby s problem it describes a formalization of mancur olson s discussion of the voluntary provision of public goods and optimal contributions by lobbies to political campaigns section ii describes determination of the equilibrium tariff positions of each politician in a political campaign

substitutability and protectionism latin america s trade policy and imports from china and india this article examines the trade policy response of latin american governments to the rapid growth of chinese and indian exports in world markets to explain more protection in sectors where a large share of imports originates in china and india the protection for sale model is extended to allow for region specific degrees of substitutability between domestic and imported varieties of a good the results suggest that more protection toward chinese and indian goods can be explained by the higher substitutability of chinese and indian goods with domestic varieties the data support the model which performs better than the original protection for sale framework in explaining latin america s structure of protection

protection for sale or surge protection this paper asks whether the results obtained from using the standard approach to testing the influential grossman and helpman protection for sale pfs model of political economy might arise from a simpler setting a model of imports and quotas with protection occuring in response to import surges but only for organized industries is simulated and shown to provide parameter estimates consistent with the protection for sale framework this suggests that the standard approach may be less of a test than previously thought

the political economy of non tariff measures over the last decades non tari measures ntms have seen an important upsurge how ever little research has focused on the political economy of non tariff protection and the existing studies are mainly based on a single country or a specific type of measures this paper seeks to fill the gap by empirically evaluating the determinants of ntms in several countries both developed and developing overall results show certain protectionist purposes behind the adoption of ntms this conclusion is reinforced for restrictive measures i e subject to trade concerns but does not hold for non restrictive measures suggesting the legitimate goal of several ntms furthermore transnational lobbying defined as the influence exerted by national business groups during the ministerial conferences the highest authority of the world trade organization wto increases the probability of adopting ntms in both developed and developing countries

can we obtain realistic parameter estimates for the protection for sale model in the grossman and helpman 1994 model of endogenous trade protection sectoral lobbies try to influence an incumbent government that maximizes a weighted sum of political contributions and aggregate welfare we empirically investigate this model using u s and turkish data our specification is more tightly tied to theory than those in existing studies additionally we assume all specific factor owners to be organized into different lobbies these changes validated by hypothesis tests yield more realistic parameter estimates of the government s concern for aggregate welfare and of the fraction of population organized into lobbies peut on obtenir des calibrations realistes des parametres du modele de protection en vue d augmenter les ventes dans le modele de protection commerciale endogene de grossman helpman 1994 des lobbys sectoriels tentent d influencer un gouvernement en place qui maximise une somme ponderee des contributions politiques et du bien etre collectif les auteurs utilisent ce modele pour analyser les donnees pour les etats unis et la turquie on specifie le modele d une maniere qui serre de plus pres la theorie que ce qui a ete le cas dans les etudes anterieures de plus on assume que tous les proprietaires de facteurs de production specifiques sont organises en lobbys differents ces changements valides par des tests d hypotheses engendrent des estimations plus realistes des parametres de la fonction d interet du gouvernement pour le bien etre collectif et pour la fraction de la population organisee en lobbys

endogenous lobby formation and endogenous protection a long run model of trade policy determination this paper provides a theory of lobby formation within a framework in which trade policy is determined through political contributions under certain conditions free trade turns out to be an equilibrium outcome either when the government has a high affinity for political contributions or when it cares a great deal about social welfare moreover greater inequality in asset distribution results in a greater number of lobbies and in most cases more protection for each of these lobbies furthermore industries with higher levels of capital stock fewer capitalists more inelastic demand and smaller geographical dispersion are the ones that get organized

asset pricing under optimal contracts we consider the problem of finding equilibrium asset prices in a financial market in which a portfolio manager agent invests on behalf of an investor principal who compensates the manager with an optimal contract we extend a model from buffa vayanos and woolley 2014 by allowing general contracts and by allowing the portfolio manager to invest privately in individual risky assets or the index to alleviate the effect of moral hazard agent is optimally compensated by benchmarking to the index which however may incentivize him to be too much of a closet indexer to counter those incentives the optimal contract rewards agent for taking specific risk of individual assets in excess of the systematic risk of the index by rewarding the deviation between the portfolio return and the return of an index portfolio and the deviation s quadratic variation

trade policy reform endogenous lobby group formation and environmental policy abstract this paper explores the effects of trade liberalization on environmental policy outcomes when collective action is endogenous the polluting industry s ability to undertake lobbying is shown to depend on the degree of competition in the product market establishing a new link between trade and environmental policies if trade liberalization causes industry collective action to become harder to sustain the stringency of the environmental policy is likely to rise these results highlight the role of trade liberalization on product market competition and its consequent impact on the incentive to lobby for less stringent environmental policies

do countries free ride on mfn abstract the most favored nation mfn clause has long been suspected of creating a free rider problem in multilateral trade negotiations to address this issue we model multilateral negotiations as a mechanism design problem with voluntary participation we show that an optimal mechanism induces only the largest exporters to participate in negotiations over any product thus providing a rationalization for the principal supplier rule we also show that through this channel equilibrium tariffs vary according to the herfindahl hirschman index of export shares higher concentration in a sector reduces free riding and thus causes a lower tariff estimation of our model using sector level tariff data for the u s provides strong support for this relationship

china trade policy review a political economy approach chinese trade policy has experienced great reversal in the year of 2008 a series of constraining measures taken previously have been loosened eventually we investigate this situation using a political economy approach unlike in democratic countries where interest groups play a crucial role in trade policy change in china given the political reality leaders will and trade partners pressure are the determinant factors we call this top down and outside in trade policy actually the idea of harmonious society and scientific development emphasised by top leaders in october 2006 paved the road for the following trade policy adjustment i e reducing tax rebate limiting processing trade compressing the catalogue for foreign investment etc however with the shock of a global financial tsunami these measures get coastal areas relying on foreign trade heavily into trouble the economic downturn in pearl river delta even astonished the decision making body calling on a quick reversal in foreign trade policy if interest groups had been allowed to express their demand formally and adequately from the very start the cycle of taking up first but giving up last in policy design would have not taken place in other words the bottom up and inside out trade policy should be more stable although flexibility is necessary in the face of uncertainty frequent and discretionary trade policy change usually produces effects of pro government not pro market this is unfavourable for the transformation in china the constraining trade policy in mid 2007 to mid 2008 has been a part of the government s desire to seek healthier development however with the inside and outside surroundings getting worse the structural adjustment long run objective has had to concede to the economic growth short run objective

protectionism versus risk in screening for invasive species abstract i examine the extent to which enforcement of a biosecurity import restriction us border inspections for foreign pests and diseases is used as a protectionist trade barrier the parameters of a structural model of border inspection are estimated using a detailed dataset documenting the outcome of us agricultural border inspections i find that inspections are conducted in a manner that places an implied welfare weight on domestic producers relative to consumers ranging from 1 to 1 63 i also find evidence that the inspection agency takes terms of trade into account when inspecting agricultural imports these results suggest that border inspections are used as a protectionist non tariff barrier

an exogeneity test for a simultaneous equation tobit model with an application to labor supply a test of weak exogeneity in the simultaneous equation tobit model is proposed and illustrated using a female labour supply model estimated using cross section data the test statistic can be simply output from any standard tobit maximum likelihood package and is asymptotically efficient the procedure provides consistent estimators for the simultaneous tobit model whose asymptotic covariance matrix is a simple extension of the usual tobit formula we also provide the lagrange multiplier test of weak exogeneity this abstract was borrowed from another version of this item