What is the magnitude of fixed–mobile call substitution? Empirical evidence from 16 European countries

This paper investigates the degree of fixed–mobile call substitution (FMCS) within different European countries. We use quarterly data from 2004 to mid-2010 on 16 mainly Western European countries. By applying dynamic panel data techniques, we are able to estimate short- and long-run elasticities of the telecommunication usage prices on the fixed-line call demand. The own-price and cross-price elasticities found give strong empirical evidence for substitutional effects towards mobile services. In particular, the estimated cross-price elasticities of the mobile price on the fixed-line call demand are relatively large compared to other studies.     

Household food demand in Turkey: A two-step demand system approach

Demands for sixteen food products are investigated, using data from the Turkish Household Expenditure Survey. The linear approximate almost ideal demand system (LAIDS) is estimated with Shonkwiler and Yen’s two-step procedure. All own-price elasticities are negative and expenditure elasticities positive. Bread, other cereals, bovine, mutton, giblets, and cheese have high expenditure elasticities. Mutton, bovine, and several other protein-rich products are price elastic. Results suggest a mix of gross substitutes and complements, while net substitution is the dominant pattern. Demographic characteristics also play important roles in shaping food demand. The elasticity estimates can inform policy deliberations.     

Omitted budget constraint bias in discrete-choice demand models

A large body of discrete-choice demand studies estimate a demand model in which the consumer’s budget constraint is not taken into account. We illustrate how incorrectly specifying the consideration set, when in fact the budget constraint binds for some products, may bias the demand estimates. We illustrate and quantify the nature of the bias in three ways: (i) in analytical examples; (ii) in field data commonly used in the literature and (iii) in a Monte Carlo study. We find that the price sensitivity can be substantially lower when correctly imposing the budget constraint, and own-price elasticities are typically overestimated although the direction of the own-price elasticity bias is in general ambiguous and depends on the income distribution.     

WHAT HAPPENS WHEN DEMAND IS ESTIMATED WITH A MISSPECIFIED MODEL?*

We conduct Monte Carlo experiments to investigate the biases of assuming a misspecified demand model. We study continuous models (linear, log‐linear and AIDS), and discrete choice models (logit) in the context of differentiated products and aggregate data. Estimating demand with the ‘wrong’ model yields varying degrees of bias in estimated elasticities, but the logit model can yield unbiased estimates for a certain size of the assumed market potential. Merger simulations confirm the key importance of market potential in logit estimation suggesting that a discrete choice model may be preferable even when the discreteness of the purchase decision is questionable.     

Intermedia Substitutability and Market Demand by National Advertisers

We assess substitute and complementary relationships among eight national advertising media classes, as well as the magnitude of their own-price elasticities. We employ a translog demand model, whose parameters we estimate by three-stage least squares, based on 1960–94 annual U.S. data.We find aggregate demand by national advertisers for each of the eight media isown-price inelastic, and that cross-price elasticities suggest slightly more substitutethan complementary relationships, although both are rather weak. These patterns areconsistent with long prevailing institutional arrangements and media selection practices.     

Conjectures, firm characteristics, and market structure : An empirical assessment

This paper makes use of a unique data set to investigate how firms in the Vancouver, British Columbia retail-gasoline market view their rivals and how consumers in turn view these firms. Own- and rival-price elasticities of demand, conjectural variations, and Lerner indices are estimated for thirteen service stations in a submarket of Vancouver. These variables are then related to firm characteristics such as type of ownership, degree of horizontal and vertical integration, and type of service. In this way, systematic patterns in seller behavior and in buyer attitudes are revealed.     

Consumer responses to front-of-package labeling in the presence of information spillovers

Voluntary nutrition labeling, a means of nutrition quality disclosure, was introduced in the U.S. over the last decade by leading food manufacturers, primarily in the form of front-of-package (FOP) labeling. This article examines how consumer responses to FOP labeling via product participation and information spillovers shift consumer demand across competing products. Applying a random coefficient logit demand model to sales data from the U.S. ready-to-eat cereal market (RTEC) empirically confirms a positive participation effect of FOP and a strong negative spillover effect on non-participating products. Further results indicate that the participation and spillover effects are stronger for healthy RTECs than they are for unhealthy ones. Moreover, ignoring such effects leads to underestimation of consumer valuation of FOP labeling for participating products, higher own-price elasticities of demand and lower price-cost margins. The findings also suggest that an incentive in a firm’s voluntary participation in self-regulated labeling programs is to avoid negative treatment externalities and that less health-conscious consumers are not influenced by spillover effects. Overall, this article highlights the importance of including spillover effects in the evaluation of FOP programs and that FOP can play a positive role in improving the healthfulness of consumer choices.     

Quantifying price-driven wireless substitution in telephony

For the better part of a decade, a non-trivial and steadily increasing share of households in the United States has come to rely exclusively on wireless technology for their voice communications needs. Aggregate data show clearly (1) that the share of wireless-only households has risen steadily in recent years; while (2) the price of wireless service has fallen substantially relative to traditional landline service. The aggregate data are therefore consistent with the hypothesis that wireless/wireline cross-price elasticities are positive and economically significant. However, econometric corroboration of this conjecture has proven elusive in the existing empirical literature, which has relied on datasets compiled at the turn of the millennium, when wireless substitution was very limited. Partly in response to this dearth of econometric evidence, regulators and competition authorities in the US have generally been reluctant to conclude that wireless voice service represents a meaningful economic substitute for traditional wireline telephony. In the absence of reliable econometric estimates, even the sign of the relevant cross-price elasticities is an open question: The majority of US households maintain both a landline and at least one wireless connection, so it is unclear, ex ante, whether the two services are substitutes or complements. Thus, it is critical to identify consumer behavior at the margin. Using state-level panel data from a relatively recent time period (2001-2007), this study develops and estimates a demand system that permits evaluation of the own-price, cross-price, and income elasticities of demand for wireless and wireline telephony in the United States. A one percent decrease in the price of wireless service is estimated to decrease the demand for fixed-line service by approximately 1.2-1.3%, and the parameter estimates imply that the Slutsky symmetry holds for the demand system. These results substantially exceed prior econometric estimates from the existing empirical literature, and provide evidence that wireless voice service has evolved into a strong economic substitute for traditional landline service. The parameter estimates from the demand system suggest that roughly two thirds of observed landline attrition in the United States over the sample period is attributable to the observed decline in the relative price of wireless service.     

Cheap Tuesdays and the demand for cinema

Many movie markets are characterised by extensive uniform pricing practices, hampering the ability to estimate price elasticities of demand. Australia presents a rare exception, with most cinemas offering cheap Tuesday ticket prices. We exploit this feature to estimate a random coefficients discrete choice model of demand for the Sydney region in 2007. We harness an extensive set of film, cinema, and time-dependent characteristics to build a rich demand system. Our results are consistent with a market expansion effect from the practice of discounted Tuesday tickets, and suggest that cinemas could profit from price dispersion by discounts based on observable characteristics.     

企业间网络的效率边界:经济组织逻辑的重新审视

企业间网络是一种既不同于市场也不同于企业科层的组织形式，它是一些经过筛选的独立的企业通过正式契约和隐含契约所构成的互相依赖、同担风险的长期合作的交易模式。本文综合交易成本理论以及企业能力理论对影响企业网络边界的因素分别进行了阐释，对资产专用性、企业能力、不确定性等因素对企业边界的影响机制进行了分析。随着资产专用性的逐步提高，在其他条件不变的情况下，交易的治理机制逐步从市场过渡到企业网络，当资产专用性进一步提高时，企业科层将替代企业网络。当企业之间的能力是互补但不相似时，交易将通过企业网络来进行。同时，产品需求的不确定性也将导致企业间网络组织的出现。     

Multiproduct retailing and consumer shopping behavior: The role of shopping costs

We empirically examine the role of shopping costs in consumer shopping behavior in a context of competing differentiated supermarkets that supply similar product lines. We develop and estimate a model of demand in which consumers can purchase multiple products from multiple stores in the same week, and incur transaction costs of dealing with supermarkets. We show that a similar model without shopping costs predicts a larger proportion of multistop shoppers and overestimates own-price elasticities and product markups. Further, we use our model along with a model of competition between supermarkets to study two practices that are commonly used by supermarkets: product delisting and loss-leader pricing. We show that the presence of shopping costs makes product delisting less profitable whereas it makes loss-leader pricing more profitable compared to a context in which consumers do not incur shopping costs.     

Biases in demand analysis due to variation in retail distribution

Aggregate demand models typically assume that consumers choose between all available products. Since consumers may be unwilling to search across every store in a given market for a particular item, this assumption is problematic when product assortments vary across stores. Using supermarket scanner data for five product categories we demonstrate that approximately one third of products have limited retail distribution, which account for one fourth of dollar sales. Monte Carlo analysis demonstrates that the level of limited product availability observed in the data can significantly bias the results of aggregate demand models that incorrectly assume all consumers in a given market face the same choice set.     

The Survival of New Products

We study the survival of new products in a market with horizontal product differentiation and rapid product turnover. Our data set consists of monthly sales for all new products in the Swedish beer market during 1989–1995. Results show that products with low and decreasing market shares have high hazard rates. The hazard rates are also dependent on firm characteristics; products from firms with the largest market shares face a greater risk of being withdrawn. We argue that high hazard rates of new products can help to explain high failure rates of new firms.     

Efficient versus Responsive Supply Chain Choice: An Empirical Examination of Influential Factors

Contemporary strategies in operations management suggest that successful firms align supply chain assets with product demand characteristics in order to exploit the profit potential of product lines fully. However, observation suggests that supply chain assets often are longer lived than product line decisions. This suggests that alignment between supply chain assets and demand characteristics is most likely to occur at the time of initial market entry. This article examines the association between product demand characteristics and the initial investment in a supply chain at the time of market entry. We characterize supply chains as responsive or efficient. A responsive supply chain is distinguished by short production lead‐times, low set‐up costs, and small batch sizes that allow the responsive firm to adapt quickly to market demand, but often at a higher unit cost. An efficient supply chain is distinguished by longer production lead‐times, high set‐up costs, and larger batch sizes that allow the efficient firm to produce at a low unit cost, but often at the expense of market responsiveness. We hypothesize that a firm's choice of responsive supply chain will be associated with lower industry growth rates, higher contribution margins, higher product variety, and higher demand or technological uncertainty. We further hypothesize that interactions among these variables either can reinforce or can temper the main effects. We report that lower industry growth rates are associated with responsive market entry, but this effect is offset if growth occurs during periods of high variety and high demand uncertainty. We report that higher contribution margins are associated with responsive market entry and that this effect is more pronounced when occurring with periods of high variety. Finally, we report that responsive market entry also is correlated positively with higher technological demand uncertainty. These results are found using data from the North American mountain bike industry.     

Competition in Turkish mobile telecommunications markets: Price elasticities and network substitution

This paper estimates demand elasticities for Turkish mobile telecommunications markets. In contrast to most other studies, firm-level data is used to estimate dynamic panel data models including instrumental variable techniques. Both short- and long-run elasticities are calculated, yielding a long-run price elasticity of −0.72 for the post-paid market and of −0.33 for the pre-paid market. The short-run price elasticity is estimated to be −0.36 for the post-paid market and −0.20 for the pre-paid market. In addition, there is evidence of fixed-to-mobile traffic substitution for consumers who use pre-paid cards.     

Heading for new shores: Do service and hybrid innovations outperform product innovations in industrial companies?

This study investigates the financial outcomes of product, service, and hybrid innovations in industrial markets. To date, empirical research has focused on product innovations, yet industrial firms are increasingly competing with innovative services to maintain their competitive edge. This study assesses the financial impact of service and hybrid innovations compared with more traditional product innovations. We develop a unique data set that combines information on companies' innovation activities with objective financial data. From a sample of 348 German industrial firms, the analysis reveals that service innovations do not outperform product innovations in industrial markets. A focus on service innovations only pays off in highly price-conscious markets. In contrast, hybrid innovations, referring to the simultaneous market introduction of new products and services, have a positive effect on firm performance above and beyond pure product innovations. This effect is particularly pronounced in competitive markets and under conditions of high customer concentration. In sum, this study demonstrates that hybrid innovations outperform both, pure product and service innovations in industrial markets.     

Launch Decisions and the Early Market Survival of Innovations: An Empirical Analysis of the Italian Mobile Value‐Added Services (VAS) Industry

There is a surprisingly high number of new products and services that fail to produce enough return on the firm's investments in development and launch activities. Literature has shown that these failures can be due to a poorly planned and executed launch. Although a vast stream of research has studied how strategic and tactical launch decisions affect the performance of new products and services, some issues still need theoretical and empirical investigation. This paper aims to extend new product launch research in two ways. First, it studies how tactical launch decisions (i.e., investments in advertising and involvement of external organizations in the launch process) interact with an important strategic choice (i.e., the degree of radicalness of the new product or service) to affect new product performance. Second, it focuses on a particular dimension of performance, that is, early market survival, which has been overlooked in launch strategy and tactics research so far. Using a data set comprising more than 9300 new mobile value‐added services launched in Italy between 2003 and 2006, the paper finds that launch tactics interact with the radicalness of the innovation to affect early market survival. In particular, communicating the distinctive characteristics of the new product or service and partnering with external organizations during the launch process are tactics that work particularly well with radical innovations. This is possibly due to the fact that they help reduce customers’ uncertainty regarding expected benefits and transaction costs, and hence contribute to win their resistance to adopt the innovation soon after launch. Investments in corporate advertising lead instead to a tangible improvement of the probability of early market survival for both radical and incremental innovations. In other words, the positive impact on the probability of early survival of increasing investments in corporate advertising appears to be relevant for both radically and incrementally new services. One possible explanation is that this tactic helps increase the number of potential customers who come to know about the existence of the innovating firms and its offering soon after launch, but this is likely to be equally important to stimulate early diffusion of both incremental and radical innovations.     

MARKET PERFORMANCE WITH MULTIPRODUCT FIRMS*

We revisit the fundamental issue of market provision of variety associated with Chamberlin, Spence, and Dixit‐Stiglitz when firms sell multiple products. Both products and firms are (horizontally) differentiated. We propose a general nested demand framework where consumers first decide upon a firm then which variant to buy and how much (the nested CES is a special case). We use it to determine the market's biases when firms compete in product ranges and prices. The market system attracts too many firms with too few products per firm: firms restrain product ranges to relax price competition, but this exacerbates over‐entry.     

Supply function equilibria with capacity constraints and pivotal suppliers

The concept of a supply function equilibrium (SFE) has been widely used to model generators' bidding behavior and market power issues in wholesale electricity markets. Observers of electricity markets have noted how generation capacity constraints may contribute to market power of generation firms. If a generation firm's rivals are capacity constrained then the firm may be pivotal; that is, the firm could substantially raise the market price by unilaterally withholding output. However the SFE literature has not fully considered the impact of capacity constraints and pivotal firms on equilibrium predictions. We characterize the set of symmetric supply function equilibria for uniform-price auctions when firms are capacity constrained and show that this set is increasing as capacity per firm rises. We provide conditions under which asymmetric equilibria exist and characterize these equilibria. In addition, we compare results for uniform-price auctions to those for discriminatory auctions, and we compare our SFE predictions to equilibrium predictions of models in which bidders are constrained to bid on discrete units of output.