W characterize the equilibrium behavior in a broad class of competition models in which the competing firms’ market shares are given by an attraction model, and the aggregate sales in the industry depend on the aggregate attraction value according to a general function. Each firm’s revenues and costs are proportional with its expected sales volume, with a cost rate that depends on the firm’s ch...

We study identification of combinatorial valuations from aggregate demand. Each utility function takes as arguments subsets or, alternatively, quantities of the multiple goods. We exploit mathematical insights from auction theory to generically identify the distribution of utility functions. In our setting, aggregate demand for each item is observable while demand for bundles is not. Neverthele...

Timber supply has traditionally been modelled using aggregate data. In this paper, we build aggregate supply models for four roundwood products for the US state of North Carolina from a stand-level harvest choice model applied to detailed forest inventory. The simulated elasticities of pulpwood supply are much lower than reported by previous studies. Cross price elasticities indicate a dominant...

Gender imbalances in work environments have been a longstanding concern. Identifying the existence of such imbalances is key to designing policies to help overcome them. In this work, we study gender trends in employment across various dimensions in the United States. This is done by analyzing anonymous, aggregate statistics that were extracted from LinkedIn’s advertising platform. The data con...

While aggregate data do not show the investment echoes predicted by vintage-capital models, echoes arise in rates of entry and exit of firms at the industry level. Moreover, industries where prices decline rapidly experience early ‘shakeouts’. The relation emerges naturally in a vintage-capital model in which exit of firms sometimes accompanies the replacement of their capital, and in which a s...

For the first time after 1979 revolution in Iran, the 2005 presidential election went to the second round. Not only neither candidates could win the majority of the votes in the first round, but the potential voters in the first round were fairly divided between the 7 candidates and abstention. It created a relatively rich menu of options for the voters to choose from, however by using data fro...

We use a unique proprietary monthly panel data set on the operations of a large hotel firm to study the effect of vertical integration decisions on the pricing and performance (occupancy rate and RevPar) of individual hotels. Aggregate data patterns – which managers pay most attention to – suggest sizeable performance differences between franchised and non-franchised hotels. However, empirical ...

We present the TreeScape system that, unlike any other system known to the authors, enables the reuse of pre-computed aggregate query results for irregular dimension hierarchies, which occur frequently in practice. The system establishes a foundation for obtaining high query processing performance while pre-computing only limited aggregates. The paper shows how this reuse of aggregates is enabl...

It is well-known that the results of analyses of aggregate data, such as those provided as outputs from censuses, are dependent on the size and shape of the zones used to report the data. However, many users of aggregate census data do not consider how far the zones utilised in their analyses capture spatial information about the population sub-groups they are studying. In addition, future data...