A model of optimal advertising expenditures in a dynamic duopoly

This paper develops a dynamic model of oligopolistic advertising competition. The model is general enough to include predatory advertising and informative advertising as particular cases. The analysis is conducted in a differential game framework and compares the open-loop and feedback equilibria to the efficient outcome. It is found that for the informative advertising competition game, advertising levels are closer to the collusive outcomes in a feedback equilibrium. In the case of predatory advertising, expenditures are inefficiently high in a feedback equilibrium and the open-loop solution is more efficient.     

The macroeconomic impacts of the COVID-19 pandemic: A SIR-DSGE model approach

This paper proposes a susceptible-infected-removed dynamic stochastic general equilibrium (SIR-DSGE) model to assess the macroeconomic impact of the recent COVID-19 outbreak. The parameters of the SIR setting are calibrated to COVID-19 data from China. Using the model, we illustrate how the pandemic could result in consumption and output loss. We show that a combination of quarantine policy and random testing of the uninfected is effective in reducing the number of infected individuals and outperforms the alternative scenarios in which only one of the policies is implemented. Moreover, the economic impacts of both policies are evaluated. Compared with the decentralized equilibrium, we find that the Ramsey social planner allows output to decrease more substantially during the pandemic, in exchange for a faster economic recovery.     

多措并举 打击防疫物资侵权假冒行为

疫情就是命令,防控就是责任。新冠肺炎疫情发生后,习近平总书记多次作出重要指示,党中央、国务院作出一系列决策部署。从中央到地方,有力行动,精准施策,社会各界携手同心,迅速打响疫情防控阻击战,不遗余力共同应对疫情。为深入贯彻落实习近平总书记关于疫情防控工作的重要指示精神和党中央、国务院的重大决策部署.     

Endogenous price leadership in a duopoly: Equal products, unequal technology

In the present paper we study endogenous price leadership in the context of a homogeneous product Bertrand duopoly model in which the firms have different, strictly convex cost functions. In such a framework it is well known that a simultaneous move price choice game does not have an equilibrium in pure strategies, but it has an equilibrium in mixed strategies. In the Stackelberg games with an exogenous price leader, we show that a pure strategy subgame perfect Nash equilibrium (SPNE) always exists. Although the SPNE might not be unique, the payoffs are the same across all SPNE. Finally, we analyze the issue of endogenous price leadership using the continuous version of the Robson (1990) timing game. The result is unexpected. One would expect the more efficient firm to emerge as the endogenous price leader. This is not always true. In most cases the endogenous leader is the firm with the highest "threshold" price. However, we also provide conditions under which the more efficient firm emerges as the leader. Our paper essentially complements Yano (2001) , which is based on the Hamilton and Slutsky (1990) framework.     

A clay-clay vintage model approach for sectors of industry in Netherlands

Summary To confirm on a more disaggregated level earlier macro-economic studies in the field, an attempt is made in this paper to find out whether a vintage model of the clay-clay type also provides a framework for a plausible explanation of long-run sectoral developments of production capacity, labour requirements and employment. Nine sectors are considered, comprising the total enterprises sector. For this total enterprises sector an (amended) clay-clay vintage model is also (re-)estimated. The results indicate that in the process of adjustments, real labour costs are the strategic variable, though capacity utilization is also recognized as a factor affecting employment directly and indirectly. Projections of employment with the macro vintage model are satisfactory. Specifically, they are more satisfactory than the extrapolations for either manufacturing or non-manufacturing taken separately, and the macro projections compete fairly well with those based on an overall aggregation of employment projections over all nine sectors considered.     

Robust determinants of growth in Asian developing economies: A Bayesian panel data model averaging approach

This paper investigates the determinants of growth in the Asian developing economies. We use Bayesian model averaging (BMA) in the context of a dynamic panel data growth regression to overcome the uncertainty over the choice of control variables. In addition, we use a Bayesian algorithm to analyze a large number of competing models. Among the explanatory variables, we include a nonlinear function of inflation that allows for threshold effects. We use an unbalanced panel data set of 27 Asian developing countries over the period 1980–2009. Our empirical evidence on the determinants of growth suggests that an economy's investment ratio is positively correlated to growth, whereas government consumption expenditure and terms of trade are negatively correlated. We also find evidence of a nonlinear relationship between inflation and economic growth, that is, inflation impedes economic growth when it exceeds 5.43% but does not have any significant effect on growth below that level.     

Petty corruption: A game-theoretic approach

The paper explores a game-theoretic model of petty corruption involving a sequence of entrepreneurs and a track of bureaucrats. Each entrepreneur's project is approved if and only if it is cleared by each bureaucrat. The project value is stochastic; its value is observed only by the entrepreneur, but its distribution is common knowledge. Each bureaucrat clears the project only if a bribe is paid. The bribe for qualified projects ("extortion") and unqualified projects ("capture") may differ. We identify the nature and welfare implications of different types of equilibria under appropriate technical assumptions on the structure of the game.     

Lobbying paradox of strategic export policy in a differentiated duopoly

This paper presents an analysis of lobbying based on imperfect competition by using three-stage game. It seeks to explain why lobbying efforts might be influenced by a home government’s viewpoint. Endogenously determined lobbying may distort the outcomes of strategic export policy, so that the results would differ from that generated by exogenously set lobbying. The lobbying paradox results in the domestic firm being worse off than if it could credibly commit to not engage in lobbying. Moreover, in the presence of foreign firm lobbying, the desired tax level is as the same as that of the benchmark case without lobbying.     

Consumer discrimination,duopoly, and black firm entry: The welfare effect of subsidies

Consumer discrimination, to the extent that it lowers expected profit for black owned firms, discourages the entry of new black firms. From a social welfare perspective, consumer discrimination may be welfare reducing, since market output is lower than otherwise. If so, a policy intervention that subsidizes new black firms may improve social welfare. This article presents a simple model of duopoly where consumer discrimination exists with uncertainty, and the only cost of production is a “loss of sales” cost. Given the Nash equilibrium, in which a black and white firm must select a price to charge, conditions are derived for which a profit subsidy to a new black firm increases, decreases, or has no effect on social welfare.     

Exploring 200 years of U.S. commodity market integration: A structural time series model approach

This paper uses a structural time series model to explore U.S. commodity market convergence, efficiency, and intertemporal smoothing from 1750–1949. I find near-continuous convergence that is largely concentrated in the frontier, broad antebellum efficiency gains, and intertemporal smoothing from the 1880s onward among the most perishable goods. The results reveal new periods of integration across all three metrics and underscore the rapid rate of integration on the frontier.     

Trade and growth: A gravity approach

The impact of international trade, or “openness,” on economic growth is difficult to quantify because of reverse causality. In this article, I use recent advances in gravity equation estimation to generate a geography‐based instrument for openness à la Frankel and Romer (1999). In contrast with the benchmark, the new instrument is constructed using consistent and unbiased estimates of the impact of geography on bilateral trade. As a result, the instrument provides stronger identification of the impact of trade on income and increases the efficiency of the two‐stage least square estimation. An important advantage of the corrected procedure over the benchmark is that the estimated effect of trade on income remains large, positive, and statistically significant even after controlling for regional indicators and endogenous institutional quality.     

Rebalancing in China: A taxation approach

The rebalancing of the Chinese economy is analyzed through a heterogeneous taxation of various types of firms. Based on a two-country dynamic general equilibrium model, the paper applies tax reforms to raise consumption, reduce some firms' overinvestment (overcapacities) and maintain a high level of welfare.To rebalance consumption and investment, taxation may allow reallocating a part of the labor force to firms that are not overinvesting (via business taxes and social security contributions). Moreover, the correction of distortions in production factor costs (capital and labor) is necessary during certain reforms applied in the model; that is, on the one hand, higher credit costs for firms that face soft budget constraints (via financial transactions taxes) and, on the other hand, a catch-up of foreign firms' wages by domestic firms (via social security contributions).These tax reforms bring welfare benefits to households and stabilize the welfare reaction to productivity shocks. Another interesting result is that in this framework, the rebalancing of the domestic demand in China does not require the readjustment of the external financial position. Indeed, the aggregate savings rate remains high and the supply of domestic assets is reduced.Finally, another model proposes a heterogeneous taxation of consumption across home and foreign goods to enhance consumption.     

Mixed duopoly,location choice,and shadow cost of public funds

We examine the relationship between equilibrium and efficient levels of product differentiation in a mixed duopoly, where a welfare‐maximizing public enterprise competes with a profit‐maximizing private firm. We introduce shadow costs of public funding (i.e., the excess burden of taxation). The profits of public firms obtained by the government reduce these costs. We find that in a mixed duopoly, the level of product differentiation is too low for social welfare. This result is in sharp contrast to the private oligopoly, where the level of product differentiation is too high. Finally, we show that when the shadow cost is high, privatizing the public enterprise improves welfare.     

Estimates of the fisher effect: A neo-Keynesian approach

Conclusion This paper has presented estimates of a structural model designed to study the processes by which inflationary expectations affect nominal interest rates. The theoretical framework expands upon previous analyses of the effects of expected inflation primarily by analyzing a wider range of resulting substitution effects both among financial assets as a group, and between financial assets and commodities. A possible substitution effect between leisure and both these groupings (commodities and financial assets) was also considered. The empirical work differs from previous studies in that we estimate the effects of inflationary expectations on nominal interest rates within the structure of a complete macroeconomic system rather than using the single-equation approach outlined in section II above. The results provide evidence on the magnitude of the Fisher effect and the market mechanisms which comprise this effect as estimated within the neo-Keynesian system. These market mechanisms were found to consist of direct effects in the long-term bond market and on the aggregate demand for and supply of commodities. The total adjustment consists of changes in all the endogenous variables with the final outcome being an increase in each of the nominal interest rates in the model. The implied increase in nominal interest rates is less than a full-adjustment to the increase in the expected inflation rate, thus for the time period considered here, the estimates imply a fall in the real rate of interest. Prices and nominal income were also found to vary positively with the expected inflation rate. The authors wish to thank an unknown referee of this journal for helpful comments.     

Migrant farmworker earnings: A human capital approach

Migrant farmworkers are essential to the supply of low-cost agricultural produce. However, employment earnings of this vital labor force are approximately equal to the federal poverty income. This study examines the role of health capital investments in enhancing farmworker productivity and employment earnings. Health capital investments are found to have a larger marginal effect on earnings than other forms of human capital investments, such as education or experience.     

Cost analysis of water utilities: A goodness-of-fit approach

The behavior of privately owned and publicly owned water utilities is examined by calculating the percentage difference between the observed cost and the optimum cost consistent with the Weak Axiom of Cost Minimization for each individual water utility. It allows for a comprehensive analysis of nearly optimizing behavior of economic units as opposed to the conventional analysis of exact optimizing behavior. The empirical results provide evidence that private water utilities are more efficient than public water utilities.