The future of food production – a text-mining approach

ABSTRACT

The system of food production is facing grand challenges, such as a rising population, climate change, degrading bio-productivity of agricultural land and over-fishing. Agriculture and food production are becoming more innovative and implement new infrastructure, IT-platforms or biotechnologies, like gene editing or synthetic food production. A more advanced knowledge base about food innovations helps customers to build informed opinions of new technologies and provides policy makers and industry actors with better information for strategic decision-making. As the amount of available information exceeds expert knowledge or manual filtering of data outputs, this paper presents a text mining study on science and technology in food production based on more than 30 million documents. The proposed methodology which we demonstrate on the example of the future of food production can be applied each time new data becomes available and can serve as an early warning system for a changing technology landscape.     

The effects of shocks on the Austrian unemployment rate – a structural VAR approach

Assuming full hysteresis in the Austrian labour market, a simple macroeconomic framework is used to model the effect of four structural shocks, i.e. shocks to productivity, demand, wages and labour supply. By using SVAR analysis, we derive impulse-response functions that show the effects of these shocks on unemployment. What constitutes a distinctive feature of our study is the deliberate use of overidentifying restrictions, allowing for a likelihood ratio test. The objection to SVAR methodology, that it relies on arbitrary assumptions, can thus be overcome, as invalid sets of identifying restrictions are rejected. First version received: September 2000/Final version received: March 2002 RID="*" ID="*"  I thank Juan F. Jimeno, Martin Wagner, Helmut Hofer and Bernhard B?hm for their assistance; Robert Kunst and Martin Spitzer for their discussion of an earlier version of this paper; Thomas Sparla, Michael Roos and two anonymous referees for their helpful comments.     

Study on the price co-movement among the Asia Pacific,European and Chinese coal markets – based on the empirical analysis of MS-VEC model

In this article, based on weekly data of the three major coal markets (the Asia Pacific, Europe and China) from March 2008 to November 2014, an empirical research on their mutual influence and price co-movement effect among the three major coal markets is conducted by using the Co-integration Theory, Granger Causality Test and markov switching-Vector Error Correction (MS-VEC) model. The conclusions are as follows. (1) There exists a long-term cointegration relationship and bidirectional causality relationship between coal prices at home and abroad, and the influences of foreign coal markets on the domestic coal markets are stronger than the influences of domestic coal markets on foreign coal markets, and thus the interaction between the two markets leads to asymmetric linkage effects. (2) Compared with the VEC model, the MS-VEC model can reflect the nonlinear feature of price co-movement effects. (3) There exists an inherent adjustment mechanism between domestic and foreign coal markets, i.e. the coal prices will be self-revised continuously until a long-term equilibrium state is achieved when a deviation from the equilibrium state occurs. (4) There exists a co-movement effect which varies with the change of regime among the three coal prices, and the self-maintenance is strong and the status transfer phenomenon is clear in different regimes.     

Existence of equilibrium in the Helpman–Krugman model of international trade with imperfect competition

Helpman and Krugman (Market structure and foreign trade. Increasing returns, imperfect competition, and the international economy. MIT Press, Cambridge, 1985) provide a synthesis of the traditional factor proportions theory of international trade and the theory of international trade due to the exploitation of scale economies in imperfectly competitive markets. They derive illuminating results about trade patterns and gains from trade, among other things, leaving unanswered the question of existence of equilibrium, however. The central significance of their characterization of properties of free trade equilibria with inter-industry and intra-industry trade calls for an analysis of existence of equilibrium. This is the object of the present paper. We prove the existence of equilibrium for the integrated multi-sector multi-factor Helpman–Krugman economy without national borders. Well-known conditions ensure that the world economy under free trade reproduces this equilibrium and thus establishes existence of a free trade equilibrium. Since an equilibrium of the integrated economy is not necessarily unique, the same holds true for a free trade equilibrium.     

Effects of the US monetary policy shocks during financial crises – a threshold vector autoregression approach

This article analyzes the impact of monetary policy during periods of low and high financial stress in the US economy using a threshold vector autoregression model. There is evidence that expansionary monetary policy is effective during periods of high financial stress with larger responses having a higher proportionate effect on output. The existence of a cost channel effect during periods of high financial stress implies the existence of a short run output-inflation trade off during financial crises. Large expansionary monetary shocks also increase the likelihood of moving the economy out of a high financial stress regime.     

Does the educational management model matter? New evidence from a quasiexperimental approach

A growing literature has appeared in the last 2 decades with the aim to explore if the way in which publicly funded private schools are managed (a ver     

Convergence to long-run equilibrium—On some recent variations of the `pure' cross-dual model

In some recent works on the dynamics of capitalistic competition Duménil and Lévy proposed two ways to overcome the problem of instability of long-run equilibrium in cross-dual models of gravitation: in the first one a different notion of rate of profit, the `realised' rate of profit is supposed to drive capitalists' investment decisions; in the second one the goal is pursued by introducing a direct adjustment of output in response to imbalances between demand and supply. In the present paper we argue that both these procedures rise a logical problem, concerning capitalists' behaviour and their information set, and we present a re-formulation of the model that avoids it.     

Is the long-run equilibrium wage-led or profit-led? A Kaleckian approach

This paper presents a Kaleckian growth model in which (i) the rate of capacity utilization, the profit share, and the rate of employment are adjusted in the medium run, and (ii) the normal rate of capacity utilization and the expected rate of growth are adjusted in the long run. Both the Kalecki-type and the Marglin–Bhaduri-type investment functions are introduced. Using the model, we examine which regime is obtained in the long-run equilibrium, the wage-led growth regime or the profit-led growth regime.     

Analysis on the consumers＇ choices and the equilibrium in durable market which includes secondary markets

This paper presents a framework to study consumers＇ behaviors and the equilibrium in a durable market which includes secondary markets. The author puts forward a two-period model extending the Tirole＇s literature, and analyzes the equilibrium in the used durable market under perfect and imperfect information. Moreover, the conclusion shows the important role of information to consumers＇ behaviors and the equilibrium in the entire market.     

The good,the bad and the ugly – the future of patent assertion entities in Europe

Most of the available evidence on patent assertion entities (PAEs) is coming from the United States, while little is known for Europe. The up-coming Unitary Patent (UP) and the Unified Patent Court (UPC) system are considered to be game-changing elements for strategic patent options and for patent assertion activity in Europe. Many patent practitioners are watching Europe as the future market place for patenting. PAE activity in Europe is increasing and one reason for this trend is that PAEs originating from the United States are becoming more active in Europe. In the future, fuzzy boundaries of patent claims in general and of software-related claims in particular, new combinations of technologies and enhanced interoperability under the schemes of Industry 4.0 and the Internet of Things could attract PAE activity in technological fields where it has not been seen before. Altogether, some of the features of the new UPC have the potential to play into the hands of PAEs in Europe. The future will much depend on the implementation of the new UPC system, how the different divisions of the court will establish case law decisions and how PAEs will make use of the new system. The intention of the article is to provide an overview of ongoing PAE activity in Europe and to assess the future strategic options of PAEs in Europe based on the design of the new UP and UPC system.     

Assessing the employment effects of the German welfare reform – an integrated CGE-microsimulation approach

The purpose of this article is to quantify the employment effects of the recent German welfare reform. The key element of this reform was to merge the coexisting transfer systems Social Assistance (SA) and Unemployment Assistance (UA) into one unified benefit (Arbeitslosengeld II – ALG II). We also consider a second reform scenario that is intended to further improve the labour supply incentives of low-skilled workers. Our methodological contribution is to use an integrated CGE-microsimulation model. In adopting such an approach, we are able to combine the advantages of microsimulation studies by accounting for the large amount of heterogeneity in terms of households’ preferences and budget constraints with the advantages of an applied general equilibrium model. The latter permits us to identify potential general equilibrium repercussions through changes in wages and unemployment. The simulations indicate that the introduction of ALG II results in a negligible increase in employment of only 45?000 individuals. In contrast, a cut in benefit levels combined with a decrease in transfer withdrawal is shown to produce somewhat larger employment effects of about 190?000 individuals.     

Withholding investments in energy only markets: can contracts make a difference?

Although there are mechanisms to control market power in the spot market, withholding investments can still increase profits and hamper adequate capacity expansion. We examine the effect on investment of one suggested approach to reducing market power, contracting longer term. We construct a stylized model of an energy-only market where two firms, each specializing in one technology, invest in a first stage, contract part of their production in the second stage and sell the rest in the spot market in the third stage. We compare this model to one of an energy-only market having two stages, investment and a spot market. We find cases where the contracts change neither capacity nor peak prices, where the foreclosing effect of one player blocking the other from contracts markets increases investments and reduces prices, and where the opportunity to foreclose the market can incentivize one firm to lower its investment and increase its pricing power to the detriment of consumers. The model relies on the simplest possible assumptions of imperfect competition (subgame perfect equilibria with Cournot agents). We illustrate the different outcomes in a numerical example with two load steps (peak and off-peak) where we change one parameter, the height of the off-peak time segment. We find cases with increased and decreased capacity as well as no change in capacity. Since there is no general characterization of the consequences of contracts in this simple example, there can be no characterization in more complicated models that contain the market structures included here, and regulators or competition authorities cannot rely on contracts to induce sufficient capacity expansion by reducing market power. One other market mechanism that has been proposed to induce investment, a capacity auction with predetermined capacity requirements, is a potential alternative to limit market power that deserves further exploration to determine the extent to which it can provide an adequate incentive to invest in the presence of market power.     

Contestability in bus markets – evidence from the British de-regulated market

Following the 1985 Transport Act in Great Britain, reforms in the provision of bus services continue across Europe and other parts of the world to this day. The British experience, however, remains a key point of study in informing these continuing developments. This article looks at the issue of contestability in bus markets, and tests for the existence of the contestable market in Britain through an examination of fare levels, profit margins and technical efficiencies in 90 identifiable bus markets. The main conclusion is that there is evidence of the contestable market in Britain, however it can hardly be described as widespread, only found to be present in 15 of the 90 markets identified in the sample. The real issue however, particularly with regard to continuing reforms elsewhere in Europe, is the ability of regulatory authorities to maintain competitive and contestable (free) markets and the research suggests that in the face of market forces this is simply not possible. The only conclusion therefore is that contestability in the free market is not sustainable, and thus can only be introduced directly through franchising.     

Hick's recantation of the temporary equilibrium method ∗

This article deals with the neglecct of the economics profession towards Hick's change of mind, after Value and capital, concerning the appropriateness of the use of the notion of temporary equilibrium analysis. In what follows a reconstruction and critical evalaiton of Hicks's views on the legitimacy of the equilibrium method will be undertaken. It will be argued that Hicks's rejection of both the traditional (long-period) marginalist general equilibrium and the post-Walrasian alternative of temporary or intertemporal equilibrium raises wider issues that pose problems for contemporary treatments of such matters.     

Drivers of exceptional job creation – a dynamic probit approach using portuguese firm-level data

Portuguese Economic Journal - It is a well-established fact that a small number of firms, known as Gazelles, drive a disproportionately large amount of net job creation. This fact has attracted...     

Is dynamic general equilibrium a theory of everything?

Should we interpret the contributions of Edward C. Prescott and his collaborators, especially Finn Kydland and Rajnish Mehra, to dynamic general equilibrium as just a mathematical restatement of pre-Keynesian business cycle theory in the language of Arrow and Debreu? This essay advances the contrary view that Prescott has been laying the foundations for a theory of everything in macroeconomics that will stretch well beyond the frictionless environments treated in its early version. A theory of everything is an attempt to explain key empirical observations in nearly every subfield of macroeconomics from a simple, logically coherent conceptual platform with a minimum of institutional detail. After reviewing the current state of Prescott’s agenda, we examine several examples of dynamic equilibrium in economies with constant returns to scale, complete markets, idiosyncratic productivity shocks, and limited capital mobility. These examples suggest that the Solow residual controls the entire path of aggregate output if redefined more broadly to include financial, distributional and institutional variables; that the discount factor used in pricing streams of income will shift autonomously over time in response to endogenous changes in the set of unconstrained asset traders; and that a dynamic general equilibrium model with substantive frictions in financial markets goes some distance towards a joint account of well-known empirical anomalies in growth, business cycles, and asset returns.     

Political markets? Politics and economics in the emergence of markets for biodiversity offsets

This paper analyses the relationship between politics and performativity of economics in the emergence of markets for biodiversity offsets. While the role of economics in constructing markets has been demonstrated by sociology and social studies of science, it has also become apparent that politics plays an important role in the material outcome of economic experiments. Two case studies of the creation of markets for biodiversity offsets are analysed, in the United States and England. The findings suggest that the creation of both markets is rooted in the language, concepts and models of economics. Politics, on the other hand, functions as a mediator of the material expression of those models. Through this mediation effect, similar economic models are performed differently, resulting in a variety of markets. This suggests that the material outcomes of processes of market creation are not defined at the outset, but can be influenced by political processes.     

Game over? Assessing the impact of the emergence of a profitable wagering strategy in major league baseball wagering markets

Testing the impact of profitable investment strategies is often hampered by the practical difficulties of determining who knew what, and when. This study examines the impact of the publication of a profitable wagering strategy on the Major League Baseball wagering market. While standard measures of market efficiency characterized the Major League Baseball win–loss moneyline market to be efficient, previous works shows that wagering on underdogs early in the season can generate persistent profits. Though the overall efficiency of the baseball wagering market remained after publication, these profitable opportunities dissipated. Bettor behaviour is found to play varying roles across different wagering strategies; up to half of the drop in returns can be attributed to wagering market participant behaviour.     

The quandaries of social entrepreneurship studies – a discursive review of the discipline

The aim of this paper is to investigate the ways in which social entrepreneurship knowledge is both propelled and hindered by the socioeconomic circumstances. We examine the existing body of research and identify different conceptualizations and main schools of thought. We then demonstrate how the process of constructing academic representation is shaped by the prevalent public discourses. Our analysis leads to the differentiation between social entrepreneurship as mitigation and social entrepreneurship as transformation. We conclude that a better alignment of the two approaches – broadening research focus from outcome to process – would reveal their complementarity and contribute to the conceptual advancement of the discipline. We propose expanding the existing approaches with the politics of social entrepreneurship studies and stress the importance of increased reflexivity on the plight of the new discipline.