The micro-foundations of intertemporal price discrimination

Summary. This paper investigates the optimality of intertemporal price discrimination for a durable-good monopoly in a model where infinitely-lived households face an intertemporal budget constraint, and consume both durable goods and non-durable goods. We prove that the optimal price of the durable good is not constant, and may decrease or increase over time. Some households may choose to purchase the durable good at a later date, and pay lower or higher prices, since the gain in discounted utility of consuming more of the non-durable good more than compensates for the loss in utility from delaying the consumption of the durable good.Received: 12 March 2004, Revised: 7 January 2005, JEL Classification Numbers: D40, D42, D91.I would like to thank C.D. Aliprantis, the Editor, and an anonymous referee for their generous advice, and constructive comments and suggestions. I have also enjoyed discussions with John Quah on the subject. Research support from the Wharton-SMU Research Centre, Singapore Management University, is gratefully acknowledged.     

A micro-analytic threshold model for the timing of first purchases of durable goods

A micro-analytic threshold model to describe the timing of household purchases of consumer durable goods is developed and tested. The model incorporates unobserved heterogeneity via a generalized gamma distribution and accounts for time varying covariates. Further, we employ estimation methods applicable or purchase data observed at periodic intervals of time. The model outperforms other competing models for predicting the timing of purchase of durable goods in terms of fit and predictive ability. In particular, this model outperforms the logit model and the diffusion model. The generalized gamma timing model predicts well the time to purchase the durable good; we show how it can be employed for micro-segmentation of households. Several research directions and applications are described.     

Household Demand, Network Externality Effects and Intertemporal Price Discrimination

This paper examines the optimality of intertemporal price discrimination when network externality effects are present in the consumption of a durable good. We conduct our study in two settings. In a model with two household types, utilities are dependent on the cumulative proportion of households that have purchased the durable good. Next, in a model with a continuum of household types, we extend the analysis to the case where households consume both a durable good and a stream of non-durable goods. We show that in both settings, the presence of network externalities facilitates a sales strategy with intertemporal price discrimination.     

Inflation Stabilisation and the Consumption of Durable Goods

Exchange rate-based stabilisations in chronic-inflation countries have often been characterised by an initial consumption boom (which is most evident in the behaviour of durable goods) followed by a later contraction. This paper provides an explanation for such a boom-recession cycle based on the timing of purchases of durable goods. The initial fall in inflation results in a wealth effect which induces many consumers to bring forward their purchases of durable goods, thus generating an aggregate consumption boom. Since most consumers replenish their stock of durable goods at the beginning of the programme, a later slowdown follows.     

Consumer durables and the marginal propensity to consume out of permanent income shocks

This paper derives and estimates a model in which the utility of durable and non-durable consumption is allowed to be non-separable and individuals face a convex adjustment cost for the purchase of a new durable good. Panel data on subjective expectations allow us to identify income shocks and estimate the marginal propensity to consume out of permanent income shocks.     

Durability choice with differentiated products

In a two-period setting we explore the impact of a related non-durable good or service on a monopolists’ choice of product durability. We show that a renting firm will provide the social efficient cost-minimizing durability independent of the related non-durable product. Thus Swan’s [Swan, P., 1970. Durability of consumption goods. American Economic Review 60, 884–894; Swan, P., 1971. The durability of goods and the regulation of monopoly. Bell Journal of Economics and Management Science 2, 347–357] market independence result can be extended to include durable goods renters that manufacture related non-durables. This finding, however, does not extend to sales markets. With sales, the monopolist will practice planned obsolescence (manufacture goods with uneconomically short lives). We find that planned obsolescence is maximized when the related output is highly complementary with the durable good. This indicates that in durable products markets, such as the electronics industry, public policies that encourage the adoption of complements for the durable may well lead to a less efficient durability choice.     

Risk aversion,order strategy and price formation

Since goods classified as non-durable may, in fact, have a durable component, random-walk tests of the permanent income hypothesis using non-durable data series may yield incorrect results. This paper investigates this problem by first simulating a model of consumption to show the effects of durability on statistical tests of non-durable consumption models, and then by applying these tests to various disaggregated consumption series to determine the effect in practice. The paper finds that there are significant differences in the behaviour of the series within the non-durables and services catagories, and that these differences may be related to durability. The effect of this on standard tests of consumption is discussed.     

Intertemporal monopolistic pricing of non-durables

This paper provides a tractable analytical framework to study intertemporal equilibria between non-competitive supply and dynamic demand for non-durable goods. The basic hypothesis is that consumers enjoy utility from particular services rather than from commodities. Consumption of the non-durable good follows a dynamic pattern, because it depends on the stock of durables and energy demand provides the prototypical example, e.g., mobility, thermal comfort, etc. are the output of a combination of durable and non-durable goods. Indeed, turmoils in energy markets are to a great deal due to short run inflexibility and this gives this theoretical paper a topical flavour. The outcomes differ substantially across the strategic setups while differences in expectations (myopic versus rational) matter only transiently but not in the long run.      

Equilibrium in a durable goods market with lumpy adjustment

Durable goods are an important component of the business cycle. Equilibrium models of durable goods markets are made difficult by the lumpy nature of individual purchases. We show that a straightforward approximation of the distribution of durable goods holdings gives rise to a tractable equilibrium model. We analyze the case of competition as well as that of a monopoly producer.     

Taxation and market power when products are durable

Empirical studies suggest that industries hardest hit by government regulations, such as pollution regulations, are both highly concentrated and manufacture durable products. We analyze a two-period durable goods monopoly model where the firm faces government restrictions in the form of pollution or excise taxes. In contrast to non-durable monopolistic industries, we show that taxes on pollution or an excise tax on output may increase a durable goods monopolist's commitment ability and market power. Indeed, any policy which restricts future output may have the perverse effect of increasing a monopolist's bargaining power with buyers and enhance their profits.The authors would like to thank several anonymous referees and the editor for helpful comments and suggestions on earlier drafts of the paper. Of course, any remaining errors are the sole responsibility of the authors.     

Measuring the contribution of durable goods to the welfare cost of inflation

In this paper, we measure the contribution of durable goods to the welfare cost of inflation, in the context of an endogenous growth model with durable and nondurable goods, where purchases of the latter require only a partial cash payment compared with the former. Unlike existing measures, our proposed welfare measure is computationally efficient and relatively easy to implement.We find that durability adds a significant component to the welfare costs of inflation.     

Characteristics of mexican economic growth : Empirical testing of some latin american structuralist hypotheses

This article examines a series of hypotheses about the Latin American industrialization process put forward by the structuralist school of thought, using Mexico as a test case. In particular it examines the relationship between the distribution of income and associated patterns of consumption and industrial structure and its implications on demand-constraints, growth- constraints, employment constraint and multinational control. The results indicate that the modern-traditional dichotomy based on durable versus non-durable consumer goods is not the best way to examine this relationship since the consumption patterns for durable goods do not show a homogeneous behavior when distribution changes. Overall, it was found that growth and employment constraints and multinational control seem to get more exacerbated under greater inequality. With respect to the demand-constraints no definite conclusion can be made because of the mentioned heterogeneity in the response of durable goods to changes in distribution and the lack of information on relative excess capacity and/or dynamic linkages of the different sectors.     

Mergers in durable goods industries

This paper is concerned with the study of durability as an aspect of competition and market structure that contributes to determining the incentives for mergers. We find that relative to the incentives in industries that produce non-durable goods the durability of the good produced by an industry enhances the incentive for mergers in the presence of intertemporal consistency problems. Further, the analysis indicates that in durable good markets a good antitrust policy should combine a restriction to rent solely with a prudent merger policy.     

Is there a quality bias in the Canadian CPI? Evidence from microdata

Rising consumer prices may reflect shifts by consumers to new higher‐priced products, mostly for durable and semi‐durable goods. I apply Bils’ (2009) methodology to newly available Canadian consumer price data for non‐shelter goods and services to estimate how price increases can be divided between quality growth and price inflation. I find that less than one third of observed price increases during model changeovers should be attributed to quality growth. This implies overall price inflation close to inflation measured by the official index. I conclude that, according to Bils’ methodology, the quality bias is not an important source of potential mismeasurement of CPI inflation in Canada.     

The price of imports and TFP: Application to the Korean crisis of 1997–1998

This paper studies the effects of import-price shocks on measured output and productivity in a standard small open economy model and quantifies such effects in the case of the Korean crisis of 1997–1998. I argue that it is the price of imported goods relative to the price of domestic goods but not the terms of trade that determine measured output and productivity. The simulated results show that shocks to the price of imports account for about half of the output deviation (from trend), one third of the TFP deviation and two thirds of the labor deviation in 1998. For the quantitative results, the extent to which the usage of imported goods is distorted is critical and substantially larger than tariffs because of significantly sizable non-tariff distortions.     

ECONOMIC AND ENVIRONMENTAL EFFECTS OF REFILL PACKS

It is common sense that refill packs can increase the repeated use of durable goods, reduce resource waste and be conducive to environmental protection. However, their existence also has an economic effect. For instance, we find that the profit of a monopolistic firm will increase as a result of selling the refill packs when the depreciation rate of the durable good is low. In an extension of the model, we point out that there is an entrant that competes with the incumbent in relation to the composite goods and the refill packs. In order to compete in terms of the prices of the composite goods, the incumbent sells the refill packs not only to increase profit, but also to reduce the amount of waste resulting from the durable goods. As for competing in regard to the prices of the refill packs, if the cost of the composite goods is small, then the incumbent's profit from selling the composite goods will increase. By comparing two extensions of the model, we find that the environmental effect of the price competition in regard to the refill packs is greater than the environmental effect of the price competition in relation to the composite goods.     

Monetary Shocks and Real Exchange Rate Dynamics: a Reappraisal

This paper proposes a two‐country general‐equilibrium model incorporating a tradable sector with pricing‐to‐market as well as a nontradable sector. In that case, real exchange rate fluctuations arise from two sources: changes in the relative price of traded goods, that exemplify deviations from the law of one price, and movements in the relative price of traded to nontraded goods across countries. Our framework sheds light on the propagation mechanisms through which monetary shocks affect the real exchange rate. More specifically, the two components respond in opposite directions to monetary disturbances, which is consistent with data. Besides, the introduction of nontraded goods does not alter the predictive power of monetary shocks because the presence of nontraded goods magnifies the response of the deviation from the law of one price.     

Non-Traded Goods and Real Exchange Rate Fluctuations: A Structural VAR Analysis

Real exchange rate variance decompositions indicate that only a small fraction of real exchange rate movements can be attributed to changes in the relative price between traded and non-traded goods. This paper argues that those exercises, by ignoring the nature of the shocks behind real exchange rate changes, may be inadequate to measure the relative importance of non-traded goods prices. Instead, it proposes using a structural vector autoregression (SVAR) model to study the effects of shocks to the relative supply and relative demand for non-traded goods on the real exchange rate. The SVAR model is identified via long-run restrictions and is estimated for a group of advanced economies. The results indicate that for some countries, relative supply shocks can be a significant source of real exchange rate fluctuations.     

Impact of microcredit on borrowers’ expenditures: a fuzzy regression discontinuity design approach

This article uses the data from 69 villages in Bangladesh to estimate the effect of participation in microcredit programmes on household expenditures. A regression discontinuity design (RDD) is used to identify the credit effect. Our results show heterogeneous treatment effect on different types of expenditures. We show that access to credit reduces per capita expenditure on durable goods such as kitchen equipment, furniture, repair and maintenance of house and increases the expenditure on per school-going child. We also show insignificant impact of access to credit on non-durable goods and health care, recreation and gifts. Interestingly, our results indicate a positive impact of microcredit on village-level expenditures.     

Optimal Monetary Policy and Sectoral Shocks: Is International Monetary Cooperation Beneficial?

A stochastic general‐equilibrium model is used to explore the welfare effects of optimal monetary policy and the potential benefits of policy coordination. Cross‐country perfectly symmetric shocks in the traded goods sectors and imperfectly correlated shocks in the non‐traded goods sectors are considered. In this set‐up, monetary policy may not be able to achieve efficient sectoral resource allocations within countries and avoid inefficient relative price changes across countries. Welfare gains from coordination are sizable if the shocks to the traded and non‐traded goods sectors are negatively correlated and both sectors are of roughly equal size.