Lending relationships in the interbank market

We use a unique dataset to show that relationships are an important determinant of banks' ability to access interbank market liquidity. More precisely, we find that: (i) banks with a larger reserve imbalance are more likely to borrow funds from banks with whom they have a relationship, and to pay a lower interest rate than otherwise; (ii) smaller banks and banks with more non-performing loans tend to have limited access to international markets, and rely more on relationships; (iii) relationships are established between banks with less correlated liquidity shocks. These results suggest that relationships allow banks to insure liquidity risk in the presence of market frictions such as transaction and information costs. Our analysis explicitly controls for the endogeneity of bank relationships.     

The shared reward dilemma on structured populations

In this paper we study the recently introduced “shared reward dilemma” (Cuesta et al. in J Theor Biol 251:253–263, 2008) in the presence of a structure governing the interactions among the population. The shared reward dilemma arises when the prisoner’s dilemma is supplemented with a second stage in which a fixed reward is equally distributed among all cooperators. We first extend our previous results on the equilibrium structure of this game to the case of a one-shot game taking place on a regular network. Subsequently, we consider an evolutionary version of the game on both lattices and random networks. We show that the evolutionary game on graphs exhibits important differences with the case of well-mixed populations. In particular, there exists an important parameter range in which the cooperation is boosted and a single cooperator can invade a population of defectors. We study the dependence of the cooperation levels on the neighborhood size, finding that on random networks the level of cooperation reached decreases as the neighborhood size increases. Moreover, square lattices favor cooperation more than random networks, and on them cooperation may be almost full for certain parameter regions even for large neighborhood sizes. Further, we show that the effect of the population structure is never detrimental for cooperation. We interpret our results in terms of weak versus strong temptation and discuss the nontrivial issues involved in trying to promote cooperation exogenously by means of such a reward mechanism.     

An economic evaluation of tofacitinib for the treatment of moderately-to-severely active ulcerative colitis: modeling the cost of treatment strategies in the United States

Abstract

Aims: To evaluate the cost differences between a treatment strategy including tofacitinib (TOFA) vs treatment strategies including adalimumab (ADA), golimumab (GOL), infliximab (IFX), and vedolizumab (VEDO) among all patients with moderate-to-severe ulcerative colitis (UC) (further stratified by patients naïve/exposed to tumor necrosis factor inhibitors [TNFis]).

Materials and methods: An Excel-based decision-analytic model was developed to evaluate costs from the perspective of a third-party US payer over 2 years. Efficacy and safety parameters were taken from prescribing information and published trials. All patients started induction therapy on the first treatment in the strategy and continued if efficacy criteria were met and no major adverse event occurred (in which cases they proceeded to the next treatment in the strategy).

Results: The cost per member per month (PMPM) of the TOFA–>IFX–>VEDO–>GOL strategy ($1.11) was lower than that of the ADA–>IFX–>VEDO–>GOL strategy ($1.34; Δ = $?0.23) among the TNFi-naïve population (n?=?204 patients out of a plan of one million members). Similarly, the use of TOFA before ADA (i.e. TOFA–>ADA–>IFX–> VEDO) was also associated with lower PMPM costs than the use of ADA before TOFA (i.e. ADA–>TOFA–>IFX–>VEDO): $1.15 vs $1.25 (Δ = $?0.10). Similar, and often larger, differences were observed in both the overall moderate-to-severe population and the TNFi-exposed population. Sensitivity analyses resulted in the same conclusions.

Limitations: Our model relied on efficacy data from prescribing information and published trials, which were not head-to-head and slightly differed with respect to methods. Additionally, our model used representative minor and major ADRs (and the associated costs) to represent toxicity management, which was a simplifying assumption.

Conclusions: This analysis, the first of its kind to evaluate TOFA vis-à-vis other advanced therapies in the US, suggests the early use of TOFA among both TNFi-naïve and TNFi-failure patients results in lower PMPM costs compared with other treatment alternatives.     

Consumers’ preference modeling to price bundle offers in the telecommunications industry: a game with competition among operators

Network operators are merging their services, such as fixed or wireless telephony, internet or television, into single offers, called bundles. It is essential to understand consumers’ preferences to define the most profitable bundles, with their associated prices, especially in the fierce competitive current market. We start by defining a random linear utility model and then, analyze the competition between an integrated operator and new entrants proposing substitutable services. Each operator ignores the consumers’ reservation prices for his offers and has to deal with uncertainties about the marketing strategies of competitors, due to potential different size and cost structure. A two-level game is introduced and solved by backward induction. In the second level, the operators determine their optimal offer prices for each possible combination of marketing strategies while the consumers select their most profitable purchasing processes; the natural framework is that of Bayesian game theory. Finally at the top level, knowing the outcome of the other level, the operators identify which marketing strategy to use between market share expansion, segment targeting or multi-level price discrimination, to maximize their expected utilities conditionally to their private informations.     

Institutional changes, wars and stock market risk in an emerging economy: evidence from the Israeli stock exchange, 1945–1960

In an effort to understand the determinants of economic growth in an emerging economy, we analyze the effects of institutional reforms, wars and political events on the risk level of the Israeli stock market between 1945 and 1960. We find that the anticipation of wars did not have any effect but the end of skirmishes actually raised the risk on the stock market. Domestic political instability also increased the stock market risk. Finally we find that most legal reforms did not matter much.

Market strategy for promoting green consumption: Consumer preference and policy implications for laundry detergent

Green consumption is a very common phrase in our daily lives, yet product characteristics that mainly contribute to the diffusion of green products are largely unknown. Based on microeconomic theory, we conduct a conjoint survey of consumer preferences for a ubiquitous green product—laundry detergent. We analyze the correlation between consumers' demographic variables and attributes of laundry detergents through a hierarchical Bayesian mixed logit model. We find that consumer preferences for attributes display significant heterogeneity. Age and income significantly influence the marginal preferences for attributes. An examination of consumer willingness to pay and of the relative importance of each attribute reveals that price and base material are the most important attributes. Green attributes, such as skin irritation potential and biodegradability, tend to be less important. This study also examines preference heterogeneity based on previous purchase experience. To promote green consumption, we emphasize the need for policies that reduce the value‐action gap.     

Diversification,Refocusing and Firm Value

At any point in time a firm faces three restructuring choices: diversify, refocus, or do nothing. This study analyses the causes and the consequences of these actions in a unified framework using the appropriate methodologies. Various factors, such as firm's characteristics and multinational nature, its industry's characteristics, its exchange and index inclusion, and divested (or acquired) segment(s)' industry conditions, are considered as the determinants of the diversifying and the refocusing decisions. The estimation results from the corresponding multinomial logit model suggest that refocusing occurs generally due to firm‐specific reasons, and diversification due to outside factors, such as industry and economic conditions. Added or dropped segment's industry profitability, its relationship to the core business of the firm, and its relatedness to the businesses of the conglomerate's other segments have a nontrivial effect on either decision. In a related analysis, the paper explicitly models and estimates the valuation consequences that are sustained by the firm after it undertakes a refocusing or a diversification action. To isolate the changes in firm's value that are due to these decisions only, a 2SLS estimation is used to control for endogeneity that arises because the factors that affect a firm's value are likely to have also induced the firm to make the corresponding decision. The novelty of my approach is in its inclusion of variables measuring the consequences due to both actions, the diversification and the refocusing, in the same valuation equation. Contrary to some earlier findings, I find no evidence of ‘diversification discount’ or ‘refocusing premium.’ The choice of this paper to analyse all corporate restructuring decisions in a unified framework yields valuable business insights into the reasons for undertaking such corporate events.     

The European Union's accounting policy analyzed from an ethical perspective: The case of petroleum resources,prospecting and evaluation

This article uses Habermasian philosophy as a reading grid to understand the eminently political aspect of international accounting standard-setting. We specifically analyze the accounting regulations specific to the exploration for and the evaluation of mineral resources in the European context. The rise of the IASC and its successor, the IASB, favors the emergence of a new phase in accounting standard-setting, with a shift from a ruling logic to regulations that put the economic and social actors at the forefront of the negotiations. This change is particularly obvious in the notorious exception allowed by IFRS 6 (Exploration for and evaluation of mineral resources) exempting applicants from paragraphs 10–12 of the IAS 8. This example allows us to question the legitimacy of international accounting standardization and the ethical problems it poses.     

The impact of the Internet upon bank marketing

Information and communication are critical to developing customer relationships. Thus, new information and communication technologies (NICTs) became a key knowledge tool for the organisation within a relationship marketing strategy. Retail banking is a good example of a sector in which the virtualisation of relationships is increasing. However, there is no consensus as to whether banking relationships are strengthened or weakened by the use of technology. This article discusses the virtualisation of the interaction processes between banks and their customers and analyses the influence of the Internet on these relationships. A questionnaire was distributed by mail to 340 Internet banking services’ users. A principal components analysis and a multiple regression analysis were conducted in order to discuss the relationship between the identified dimensions of Internet banking and relationship marketing. The research finds three factors related to the use of Internet banking which strengthen the relationships between banks and their customers: the intensity of Internet use, the diversity of access locations and the diversity of Internet applications. From a managerial point of view, these findings have implications for the development of new relationship approaches based on technology.     

The effects of balanced and asymmetric dependence on supplier satisfaction: Identifying positive effects of dependency

Studies argue that balance in dependence is critical to supplier satisfaction in buyer-supplier relationships. We examine whether asymmetric relationships can also lead to supplier satisfaction, arguing that traditional analysis methods are unsuitable for thoroughly analyzing this issue. With polynomial regression and response surface analysis combined with dyadic data, we test the relationship between (1) balanced dependence (i.e., the buyer and supplier are equally dependent on each other) and supplier satisfaction and (2) asymmetric dependence (i.e., either the supplier or buyer is the dominant party) on supplier satisfaction. The results indicate that mutual dependence is positively related to supplier satisfaction, but surprisingly, asymmetric dependence can be related to higher levels of supplier satisfaction.