高效率并不意味高利润

正服务业企业的生产率与利润率之间,呈现一种"倒U型"关系,存在一个最优的生产率水平。对服务业企业而言,与其把生产率作为最大化的目标来对待,不如当作战略决策变量,即选择最合适的生产率,从而最大化利润率     

Weshalb konjunkturprognostiker regelmäßig den wetterbericht studieren sollten

Certainly, economic activity is infl uenced by weather conditions. In short term economic forecast, normal weather fl uctuations over the year are covered by using seasonally adjusted fi gures. However, they are calculated by time series methods and do not take into account specifi c weather conditions such as unusually mild or cold winters. In particular in the fi rst quarter of a year, it is often diffi cult to identify whether short term shifts in economic activity are due to cyclical reasons ore merely refl ect specifi c weather conditions. The paper shows that this uncertainty leads to biased forecast. After mild winters forecasts of GDP and investment in construction tend to be over optimistic whereas they are too pessimistic after atypically cold winters.     

Delegation and dynamic incentives

Using an agency model, we show how delegation, by generating additional private information, improves dynamic incentives under limited commitment. It circumvents ratchet effects and facilitates the revelation of persistent private information through two effects: a play‐hardball effect, which mitigates an efficient agent's ratchet incentive, and a carrot effect which reduces an inefficient agent's take‐the‐money‐and‐run incentive. Although delegation entails a loss of control, it is optimal when uncertainty about operational efficiency is large. Moreover, delegation is more effective with production complementarity. We also consider different modes of commitment to yield insights into optimal organizational boundaries.     

COVID-19’s impact on real estate markets: review and outlook

Financial Markets and Portfolio Management - As symbolized by vacant office buildings, empty shopping malls and abandoned flats in metropolitan areas, the new coronavirus disease 2019 has severely...     

Backup strategy for robots’ failures in an automotive assembly system

Automotive assembly lines are often characterized by robots’ failures that may result in stoppages of the lines and manual backup of tasks. The phenomena tend to impair throughput rate and products’ quality. This paper presents a backup strategy in which working robots perform tasks of failed robots. The proposed Mixed-Integer Linear-Programming based approach minimizes the throughput loss by utilizing the robots’ redundancy in the system. Two algorithms are developed to comply with stochastic conditions of a real-world environment. The performance of these algorithms is compared with several heuristics, and the downstream-backup based algorithm is found superior to all other methods.     

Rekommunalisierung versus Neukonzessionierung der Energieversorgung

The current trend back to municipal utilities (??remunicipalisation??) in the German energy system shows very different approaches and variants in the real cases. Converting the distribution network from privately-owned distribution companies to municipally-owned entities often forms the starting point of such restructuring processes. Ecological or regional development motivations are at the forefront of public debates. The authors emphasize the importance of energy economic aspects of this problem. Advantages and disadvantages of remunicipalisation projects depend strongly on the specific regional circumstances. Important factors are the potentials for cooperation and expansion of the business activities. Moreover, the price which has to be paid for taking over the network infrastructure has to be taken into account as the decisive parameter: The price for buying or renting the network and the possible revenues on the backdrop of incentive-based regulation define the economic viability for the municipality. Many of the often heard arguments pro remunicipalisation, such as the objective of decentralized energy supply, labour effects and municipal contributions to climate protection, do not fully convince in the end; as well the fiscal status of many municipalities in Germany is severe. Nonetheless remunicipalisation must not be rejected in general because there is no general proof for welfare losses resulting from these projects. In fact, it depends mainly on local influencing factors to what extent municipalities should be or become active in the field of energy supply. Among the most important aspects the preferences of the citizens, the environmental and political aims of the municipality (so far they are defined) and the available resources of the municipal decision making persons and bodies must be mentioned. However, in economic terms the leeway for the municipality remains restricted by the costs of operating the network and tariff regulation.     

Sustainability and consumption

We consider the implications of the three pillars of sustainability (environment, economy and social justice) on consumption in a wealthy country. Building a theoretical model that includes consumers, business, government, the environment, and economic and political relations between nations, we explore how sustainability should affect the consumption behavior of consumers, charitable aid to poorer countries, and responsible environmental practices by businesses. Our model enables us to provide normative implications for consumers, society and business. Importantly, we assume that all stakeholders will optimize their self-interest, and that altruism will only partly explain behavior consistent with sustainability. Among the more non-obvious findings are that (1) the poorer the poor countries are, the less the rich countries should consume, (2) the more sensitive the global political climate is to economic inequity between the rich and poor nations, the less the rich countries should consume, and (3) if aid to poor countries is effective enough, then the more materialistic the society is, the more charitable aid it should give. We also confirm a number of more intuitive findings, such as that business should use more green technology as the taxes on pollution and/or efficiency of green technology increase, and the more resource-intensive consumption is, the less consumers should consume. Taken as a whole, the findings imply that societal consumption patterns should be sensitive to aspects of environmental impact and social justice, even if altruistic motivations are absent.     

What Determines Financial Development? Culture,Institutions or Trade

This paper endeavours to determine in how far theories emphasising cultural values, dysfunctional institutions or impediments to trade can explain the vast differences in the size of financial systems across the globe. To account for endogeneity, an instrumental variables approach is pursued. For a cross-section of countries, we find that trade openness and institutions constraining the political elite from expropriating financiers tend to promote financial development. Conversely, there is only limited evidence that cultural beliefs and the cost of enforcing financial contracts significantly hamper financial development. JEL no.  F36, G2, O16