Demand for in-app purchases in mobile apps—A difference-in-difference approach

Using five “freemium” mobile app games on six European markets we examine the effect of price changes on conversion rate, number of users and viewing of rewarded videos. Our difference-in-difference estimation relies on games being available on both the Apple and Google platforms with price changes on only one platform. Our main identification comes from exogenous adjustments of Apples prices in 2021. Own-price elasticities of conversion are in the -1 to -4 range. Watching of rewarded videos decreases as in-app prices decrease with an average elasticity of around 0.5, but overall play is not affected by changes in-app prices.     

Immigration and the Property Market: Evidence from England and Wales

This article investigates the link between immigration and property markets in England and Wales. Evidence from fixed effects and shift‐share–based instrumental variable regressions suggests that an increase in regional immigration, depending on the specification, either decreases prices at the lower end of the distribution up to the median or leaves them unchanged and has (almost) no effect on mean property prices or prices above the median. The evidence suggests that these findings can be explained through an interaction between the markets for rented and owned properties as well as through changes in the usage of housing space.     

Market integration and price transmission in consumer markets of developing countries

World prices for agricultural commodities surged in 2006–08, and then again in 2011–12. In many developing countries, consumer prices for staple foods, such as bread and rice, mirrored these movements. This paper examines whether prices in urban consumer markets within developing countries are co-integrated with prices in world agricultural commodity markets. Using a single equation error correction model, we examine the response of consumer prices for wheat, rice, maize, and sorghum to changes in world market prices and exchange rates in urban centers of the developing world. Analyzing over 60 country/commodity pairings, we find that developing countries’ consumer markets are co-integrated with world markets. Yet, we also find that the transmission of changes in both world prices and real exchange rates to domestic consumer prices is not high, and that the movement of domestic consumer prices to new equilibrium with world prices after a shock to the latter is relatively slow.     

The Ethiopian Commodity Exchange and spatial price dispersion

In this article, we study the impact of an institutional intervention on market efficiency in Ethiopia. More specifically, we analyze to what extent the Ethiopian Commodity Exchange (ECX) in combination with regional warehouses have contributed to a reduction in price spreads between regional markets. Our hypothesis is that warehouses connected to the ECX reduce the dispersion between export prices and local retail prices in different coffee growing areas, as well as the dispersion between export prices and local retail prices in different coffee growing areas. By doing so, the ECX has the potential to improve the market efficiency. To identify the causal effect, we combine retail price data with information on the gradual rollout of warehouses connected to the ECX from 2007 to 2012. Our results suggest that, when two markets both have access to an operating warehouse, the average price spread is 0.86–1.78 ETB lower than it is for markets where at least one part lacks warehouse access. This is a substantial reduction considering that the average price spread over the full period is 3.33 ETB. The main results are robust to various econometric specifications, and our analysis thus suggests that local warehouses connected to the ECX have indeed improved market efficiency.     

A tale of two tails: Explaining extreme events in financialized agricultural markets

The substantial booms and busts in agricultural prices marked by extreme events across commodities lead to heated debates about the effects of speculative trading on commodity price fluctuations. This study proposes a new approach to understanding extreme events and boom–bust processes in agricultural markets. Using weekly futures data for twelve indexed agricultural commodities during 2006 to 2016, we find that extreme price changes, located in the 10% tails of the distribution, cluster across agricultural markets. We then implement a multinomial logit model to investigate which factors are associated with the propagation of extreme events. Specifically, we disentangle three transmission conduits. (1) The macroeconomic conduit captures the possibility that the synchronized extreme price events are generated by business-cycle driven demand shifts mainly in emerging economies. (2) The financial conduit refers to potential links between extreme returns and the increasing flow of money from financial participants into agricultural futures markets. (3) Finally, the energy conduit accounts for possible spillover effects due to oil price shocks. Our results indicate an important role of managed money positions and oil prices while the real demand channel remains mostly insignificant.     

The Role of Retail Prices and Promotions in Determining Cigarette Brand Market Shares

Over the past two decades, two forms of price competition have emerged within the cigarette industry: the introduction and spread of discount and deep discount cigarettes and the increased use of price-related promotions. In this paper, we use quarterly market-level, scanner-based data on cigarette prices, promotions, and sales for 50 US markets over the period from 1994-IV through 2002-II to examine the impact of price and promotions on market shares for premium, discount, and deep discount brand cigarettes. Our estimates indicate that changes in relative prices, including those resulting from promotions, account for much of observed changes in market shares.     

Retail Mergers and Food Prices: Evidence from France

This paper analyzes the impact of a merger in the French supermarket industry on food prices. Using consumer panel data, we compare the changes in prices for merging and rival firms in affected and comparison markets. We use a novel definition of affected markets when some firms have a local pricing strategy and others a more centralized pricing strategy. We find that prices increase significantly following the merger, and that the merging firms lose market shares. For the rivals, the price increases are larger in local markets, in which concentration increased and differentiation changed after the merger.     

Multimarket Contact and Rivalry over Knowledge‐based Resources

Research summary: Research shows that multimarket contact (MMC ) reduces rivalry involving downstream activities. Yet, studies showing that MMC can increase the threat of imitation suggest a need to better understand how MMC affects upstream rivalry over knowledge‐based resources. In this study, we argue that MMC increases rivalry over knowledge‐based resources since the deterrent threat of retaliation that typically leads to mutual forbearance in downstream activities will not be sufficient to restrain firms from protecting their knowledge from imitation in upstream activities. In support of these arguments we find that MMC increases the likelihood that a firm initiates patent litigation against a rival. This study suggests the relationship between MMC and rivalry may depend on the competitive domain and the type of resources over which firms are competing . Managerial Summary: How does market overlap or MMC affect rivalry between two competitors? Prior studies have largely found that an increase in market overlap decreases rivalry in less knowledge‐intensive context because of the deterrent threat of retaliation. However, in this paper, we argue that an increase in market overlap may not reduce rivalry in more knowledge‐intensive context because of heterogeneity in capabilities to protect knowledge. We find that a firm is more likely to initiate patent litigation against a rival as market overlap increases. Our findings suggest that the incentive to protect value across multiple product markets may surpass the motivation to cooperate with rivals and that managers should have a more nuanced view of how market overlap with competitors affects rivalry in more knowledge‐intensive contexts . Copyright © 2017 John Wiley & Sons, Ltd.     

The Size and Frequency of Price Changes: Evidence from Grocery Stores

We analyze a data set (on grocerystore prices for lettuce) with many advantages overthose used previously to explain firm heterogeneity inthe size and frequency of price changes. Despitecommon shocks to their input price, grocers' pricechanges vary widely in size and frequency. We testhypotheses emerging from a theoretical framework. Wefind that product, firm, and market characteristicsassociated with the benefits from and costs ofchanging price explain grocer-to-grocer variation inthe size and frequency of price changes. Moreconcentrated markets, larger firm size, and thinnerproduct markets lead to infrequent and large pricechanges.     

A quantitative analysis of trade policy responses to higher world agricultural commodity prices

The worldwide spike in prices of agricultural commodities in 2007–2008 elevated food security and social stability issues to the forefront, especially in many food-deficit countries. In order to mitigate the global food commodity price pressure on domestic markets, several major exporting and importing countries, mostly developing economies, adopted trade policy changes such as export bans (or raising export restrictions) or reducing import tariffs during the same period. This paper estimates the potential impacts of these policies on the world prices and trade of major agricultural commodities using a set of multi-country, multi-commodity, and partial-equilibrium models. Our findings suggest that over all, the trade policy responses in various countries increased the prices of all agricultural commodities, although the impact on the total net trade varies by commodity. The simulation results show that the overall impact of trade policy distortions on the world rice price is most significant at 24%, followed by wheat (14%) and barley (9%). In general, the poorer food-deficit countries/regions, which have limited power to manipulate their trade policies, experienced higher price increases compared to those major trading countries that adopted policy interventions. Also, the developing countries that are net importers which did not implement trade policy interventions experienced significant welfare losses resulting from interventions implemented by other major trading countries.     

Regulation of international roaming in the European Union—Lessons learned

This paper analyzes the evolution of prices and competition in intra-EU international roaming markets. It addresses three main research questions: (i) to what extent have market forces by themselves brought competition to retail roaming markets? (ii) Has the evolution of market dynamics in wholesale roaming improved competition? (iii) Is wholesale regulation sufficient to lead to a reduction in retail roaming prices? Data show that there has been little price-based competition both at wholesale and retail levels, despite prices being well above costs and the significant margins allowed by regulation. Available data from the period preceding the entry into force of the first EU roaming regulation also point to the same conclusion. Lack of competitive pressure in retail roaming markets and inelastic demand give little incentives for retail roaming service providers to lower prices. Wholesale international roaming markets have complex competition dynamics. They are characterized by the reciprocity of wholesale roaming agreements and traffic internalization inside transnational groups. These circumstances limit price competition at the wholesale level. The traditional regulatory approach applied to electronic communication markets has been primarily focused on wholesale regulation. However, empirical evidence shows that even if wholesale charges are reduced, retail roaming markets continue to operate at very high retail margins (for example, more than 200% retail mark-up over wholesale charges for data roaming services and incoming calls). This proves that in international roaming markets wholesale charge reductions are not necessarily passed on to retail prices. It can thus be inferred that wholesale price regulation alone is in most cases not sufficient to ensure that benefits are passed through to end users.     

Search Costs, Lags and Prices at the Pump

Evidence is mounting that long lags and asymmetric price responses to changes in wholesale prices are characteristic of many retail markets. Although long lags are often attributed to search costs, little empirical evidence exists to support this claim. The analysis offered in this paper compares price responses in gasoline and diesel markets in 15 U.S. cities. Search costs vary across these two markets, and the evidence indicates a much faster response in the diesel market where search costs are lower. Asymmetric responses, where prices rise faster than they fall, are also evident in the data. While asymmetric responses have been attributed to oligopolistic behavior, the arguments presented in this paper point to search theory as an alternative explanation.     

Cash transfers and nutrition: The role of market isolation after weather shocks

Cash transfers are a widely used policy instrument in Sub-Saharan Africa to shield vulnerable populations from malnutrition. In this paper, we focus on the role of local food markets after weather shocks as a facilitating factor for program impacts on nutrition. As food prices tend to be negatively correlated with households’ own production in isolated markets, we expect the purchasing power of cash transfers to decrease after harvest failures in such markets. To test this, we analyze the impact of Kenya’s Hunger Safety Net Programme during the 2011 drought in the Horn of Africa, considering the impacts on food consumption and the availability of macro- and micro-nutrients at the household level. We particularly focus on heterogeneous program impacts depending on the exposure to the drought, measured with satellite imagery, and impacts depending on the isolation of local food markets, approximated by price differences between community and wholesale maize prices. Our findings indicate that, despite some encouraging effects on proxy indicators, the program does not have significant impacts on nutrient availability on average. However, we do observe significant positive impacts for drought affected households in less isolated communities.     

IS MULTIMEDIA CONVERGENCE TO BE WELCOMED?*

This paper considers the consumer implications of the process of convergence across multimedia and telecoms markets. Convergence starts when one firm begins to sell products in hitherto separate horizontal markets competing against rivals active in just one or another of the markets. Convergence creates a strategic link between the markets which alters the price levels, creates the possibility of bundle prices, and creates winners and losers in the population. Partial convergence (e.g., a merged provider of telephony and internet services vs. independent sellers of telephony or internet broadband) lowers prices in the less competitive sector, raises them in the more competitive sector and raises the total prices paid by consumers active in both sectors as compared to the counter‐factual of no convergence. Full convergence (e.g., multiple firms offering TV and internet bundles) leads to deep discounts for bundle purchases but no reductions in stand alone prices paid by consumers in only one of the converging sectors. The bundle on bundle competition is so fierce that profits for all converging firms are reduced compared to the counter‐factual of partial convergence.     

Oligopoly intermediation,relative rivalry and market conduct

We consider two firms that compete against each other jointly in upstream and downstream markets under two pricing games: Purchasing to stock (PTS), in which firms select input prices prior to setting consumer prices; and purchasing to order (PTO), in which firms sell forward contracts to consumers prior to selecting input prices. The antitrust implications of the model depend on the relative degree of oligopoly rivalry in the upstream and downstream markets. Firms strategically precommit to setting prices in the less rivalrous market, which serves to soften competition in the more rivalrous market, resulting in anticompetitive effects. Bertrand prices emerge in equilibrium when the markets are equally rivalrous, while Cournot outcomes arise with upstream monopsony or downstream monopoly markets. The slope of firm reaction functions depends on relative rivalry, a feature we use to derive testable hypotheses for antitrust analysis of a wide variety of industry practices.     

Regulating prices in two-sided markets: The waterbed experience in mobile telephony

The distinguishing feature of two-sided markets is that the pricing structure, that is, the relative prices charged to each side, matters. Regulators need to understand and account for the interdependence of prices in both sides. Some interventions that lower the prices on one side can result in higher prices on the other side of such markets. This article reviews the recent literature analyzing this waterbed phenomenon in mobile telephony and draws some more general lessons for policy interventions in two-sided markets.     

Housing Attributes Associated with Capital Gain

Housing units are heterogeneous goods. Rates of change in housing prices are typically modelled as if they arise from factors unrelated to the housing unit itself. For example, housing price increases in the latter part of the 1970s and early 1980s are argued to have arisen primarily from demographic factors and the differential effects of inflation on the effective rate of taxation on income from corporate capital and on owner-occupied housing. Cross-sectional variation in price inflation is not addressed. Consumers who purchased housing units are not indifferent to their attributes. To the extent that expectations vary within regional housing markets as a consequence of variation in housing attributes, standard linear hedonic price regression may generate biased estimates of implicit prices. This paper identifies sufficient conditions for the estimates of implicit prices in linear hedonic price regressions to be unbiased and generate unbiased estimates of implied price changes. Finally, this paper identifies living space (house size) as a significant attribute related positively to the increase in individual housing prices in a regional market.     

Local impacts of a global crisis: Food price transmission,consumer welfare and poverty in Ghana

This paper takes a local perspective on global food price shocks by analyzing food price transmission between regional markets in Ghana. It also assesses the impacts of food price increases on various household groups. Taking the 2007–2008 global food crisis as an example, we show that prices for domestic grain products are highly correlated with world market prices. This is true both for products for which Ghana is highly import-dependent (e.g., rice) and the products for which Ghana is self-sufficient (e.g., maize). The econometric results also show that price transmission is high between regional producer markets and markets located in the country’s largest cities, and the distance between producer and consumer markets and the size of consumer markets matter in explaining the price transmission. The welfare analysis for households as consumers shows that the effect of world food prices appears relatively modest for the country as a whole due to relatively diverse consumption patterns within country. However, the national average hides important regional differences, both between regions and within different income groups. We find that the poorest of the poor—particularly those living in the urban areas—are hardest hit by high food prices. The negative effect of the food crisis is particularly strong in northern Ghana. The main explanations for this regional variation in the price effect is the different consumption patterns and much lower per capita income levels in the North of Ghana compared to other regions in the country.     

The Effect of Explicit Communication on pricing: Evidence from the Collapse of a Gasoline Cartel

We study the collapse of collusion in Québec's retail gasoline market following a Competition Bureau investigation, and show that it involved two empirical regularities: high margins, and asymmetric price adjustments. Using weekly, station‐level prices we test whether collusion was successful, and whether asymmetric adjustments were part of the cartel's strategy. We do so in the markets targeted by the investigation, and in markets throughout the province with similar pre‐collapse pricing (cyclical markets). Our results suggest that stations in both target and cyclical markets adjusted pricing following the announcement: margins fell (by 30%/15% in target/cyclical markets), and adjustments became more symmetric.     

PRICES,SPATIAL COMPETITION AND HETEROGENEOUS PRODUCERS: AN EMPIRICAL TEST*

Homogeneous‐producer models attribute lower prices in denser markets solely to lower optimal markups. I argue here that when producers have different production costs, competition‐driven selection on costs also reduces prices. This selection mechanism can be distinguished from the homogenous‐producer case because it implies that higher density leads not only to lower average prices, but to declines in upper‐bound prices and price dispersion as well. I find empirical support for this mechanism in the prices of ready‐mixed concrete plants. I also show these findings do not simply reflect lower factor prices in dense markets, but result instead because dense‐market producers are more efficient.