Fixed-price equilibria in a two-country model of trade: Existence and comparative statics

The Barro-Grossman-Malinvaud model of fixed-price equilibrium is extended to a two-country model of trade with a fixed exchange rate. There are various possible types of fixed-price equilibria for the international economy, depending on the structure of rationing. The existence and uniqueness of one type of fixed-price equilibrium are proved. Indeed the extension of ‘the simple macroeconomic model’ to a two-country economy allows a new treatment of the problem of uniqueness of the type of fixed-price equilibrium. At last, some comparative statics results are derived. Among others the model allows to meet on new grounds (i.e., with some microfoundations) some well known results of the conventional Keynesian approach. But much more general results can be derived, applying to a class of market states not already dealt with in international-trade theory.     

Risk assessment and risk decision-making process related to hazardous installation in France

The chemical process industry gathers critical infrastructures since chemical plants represent for the society both an instrument to generate activity and benefits (production of goods, employment, services …), and an instrument that can harm people and the environment. This paper describes the risk assessment approach need in France for licensing hazardous installations, in particular those covered by the Seveso II Directive and the implication for land-use planning. The first part explains why the French risk assessment procedure is based on the quantitative evaluation of major accident scenarios with explicit criteria, and only on qualitative analysis of the risk reducing measures without explicit criteria. The second part shows some on-going evolutions in the risk assessment process in particular for the analysis of the safety barriers. In the third part, the authors share some thoughts on the risk decision-making process.     

Increasing returns,entrepreneurship and imperfect competition

We study a simple bilateral oligopoly model in which individual agents, who are initially endowed with capital, decide sequentially (1) whether they want to act as producers (entrepreneurs) or as capital lenders (rentiers) and, then (2) which quantity of capital they would like to borrow or lend, though exchange of capital units against units of the produced good. Production takes place under increasing returns to scale. We show the existence of “natural equilibria”, at which wealthier capital owners become entrepreneurs while the remaining ones decide to be rentiers. We also study the efficiency of equilibria which is shown to increase by replication of the economy, but sometimes to decrease as a consequence of wealth redistribution.We thank an anonymous referee for his insightful comments     

Tying the politicians’ hands: The optimal limits to representative democracy

The citizen candidate models of democracy assume that politicians have their own preferences that are not fully revealed at the time of elections. We study the optimal delegation problem which arises between the median voter (the writer of the constitution) and the (future) incumbent politician under the assumption that not only the state of the world but also the politician's type (preferred policy) are the policy‐maker's private information. We show that it is optimal to tie the hands of the politician by imposing both a policy floor and a policy cap and delegating him/her the policy choice only in between the cap and the floor. The delegation interval is shown to be the smaller the greater is the uncertainty about the politician's type. These results are also applicable to settings outside the specific problem that our model addresses.     

Building and Interpreting Macro/Micro Estimates of Accrued‐to‐Date Pension Liabilities: French Reforms as a Case Study

Estimates of accrued‐to‐date pension liabilities (ADL) should become more widely accessible to statisticians and decision makers in the near future, in application of new SNA requirements. This raises two questions: how can such estimates be routinely produced, and what for? Microsimulation helps in answering the first question of the “how.” It allows ADL computations that take into account the complexity of pension rules. Concerning the “what for” question, it is known that ADL are not an indicator of global financial sustainability. Messages they convey are more interesting at the micro level, from a household perspective. This fosters the case for microsimulation which spontaneously generates consistent micro/macro results. We illustrate these points using the French situation as a case study. We emphasize one aspect of French reforms that may concern other countries as well: the move to price indexation and the connection it creates between sustainability and growth assumptions.     

Programming and Advertising Competition in the Broadcasting Industry

We analyze competition between two private television channels that derive their profits from advertising receipts. These profits are shown to be proportional to total population advertising attendance. The channels play a sequential game in which they first select their profiles (program mixes) and then their advertising ratios . We show that these ratios play the same role as prices in usual horizontal differentiation models. We prove that whenever ads' interruptions are costly for viewers the program mixes of the channels never converge but that the niche strategies are less effective and that the channel "profiles" are closer as advertising aversion becomes stronger.     

Opening entrepreneurial ecosystem’s black box: the power of networks in African low-income countries

What makes one type of entrepreneurial ecosystem (EE) more conducive to entrepreneurial dynamics than another? EE research is a hot topic, and considerable progress has been made as regards its elements, network, and actors’ components. However, some scholars regret the absence of an empirical analysis of EE as a whole to understand how EE configuration operates. To introduce this perspective, we propose an unexplored inter-organizational ties analysis among all EE actors, at a country-level scale. Based on the network theory perspective, we conduct an exploratory research in five low-income African countries, using innovative research methods (the quantitative graph theory, web scraping, the fuzzy-set qualitative comparative analysis) to understand the organizational patterns in these EEs, and their impact on entrepreneurial outcomes. At the core of this perspective lie inter-organizational ties measures of closeness, cohesiveness, and inter-connectedness, which are key causal conditions for high entrepreneurial dynamics levels and rates in low-income countries. This research underlines the importance of EE network attributes to facilitate the easy distribution of entrepreneurial nurturing components to entrepreneurs. It also highlights the importance of ease of information and knowledge flow, as well as a strong collaborative and coopetitive environment to make an EE more conducive to entrepreneurial dynamics.

     

The impact of development of customer online banking skills on customer adviser skills

The object of this article is the development of customer banking skills as a result of using online banking and its impact on the competence of customer advisers in face‐to‐face customer contacts. The main results show that online banking enables customers to develop a range of banking skills.     

The current account as a dynamic portfolio choice problem

The current account can be understood as the outcome of investment decisions made by domestic and foreign investors. These decisions can be decomposed into portfolio rebalancing and portfolio growth components, as highlighted by theoretical models. The empirical literature draws attention to the relative importance of portfolio rebalancing to explain fluctuations in capital flows, although they do not shed light on the mechanisms behind these rebalancing effects. In this paper, we provide empirical evidence of the importance of portfolio rebalancing driven by changes in investment opportunities for the dynamics of the current account. In particular, we evaluate the predictions of a partial-equilibrium model of the current account with dynamic portfolio choices, in which portfolio rebalancing is driven by changes in expected asset returns. Focusing on the dynamics of the current account between Japan and the US, we find evidence supporting innovations in investment opportunities as an important mechanism to explain international capital flows.     

Has China replaced colonial trade?

Review of World Economics - China is often suspected of taking over the extraordinary trade relationships that former colonies had within colonial empires. Besides preferential bilateral...