From Estimation Results to Stylized Facts Twelve Recommendations for Empirical Research in International Activities of Heterogeneous Firms

Heterogeneous firms are at the heart of both the New New International Trade Theory and the Micro-econometrics of International Firm Activities. One important aim of micro-econometric studies is to uncover stylized facts that hold over space and time, and that can both inspire theoretical models that are based on “realistic” assumptions, and inform policy debates in an evidence-based way. Which results from the thousands of empirical estimates reported in the literature on the micro-econometrics of international firm activities do we consider as convincing? Based on my own experience from the last twenty years I use the opportunity of this paper to make twelve recommendations that, hopefully, will help to find the right way on the thorny road from estimation results to stylized facts. I will deal with the following topics: comparisons of means vs. comparisons of distributions; extremely different firms, or outliers; unobserved heterogeneity; simultaneous occurrence of differences across quantiles, outliers, and unobserved heterogeneity; heterogeneous effects of international firm activities on firm performance; replication; within-study replication by international research teams; meta-analysis; and talking to practitioners.     

The multiresolution histogram

We introduce a new method for locally adaptive histogram construction that doesn’t resort to a standard distribution and is easy to implement: the multiresolution histogram. It is based on aL ₂ analysis of the mean integrated squared error with Haar wavelets and hence can be associated with a multiresolution analysis of the sample space.     

Profitability and market share: A reflection on the functional relationship

The paper analyzes the functional relationship between profitability and market share for type of businesses in the PIMS data base. Although a linear relationship has been imposed in other studies, our result shows that empirically it seems a poor representation of the data. In addition, three observations seem to be most evident. First, small-share businesses were not per se less successful than larger business units. In the service market and the market for raw or semi-finished materials small-share businesses were just as profitable or even more profitable than larger business units. Second, some businesses were ‘stuck in the middle’, which was most evident in the service market but also in the retail and wholesale markets. Third, very large-share businesses were often less profitable. A critical market share was identified as between 65 and 70 percent. Beyond that level the ROI decreased.     

A Note on the Firm Size – Export Relationship

The positive relationship between firm size and direct exports is often considered as a stylized fact. Numerous econometric investigations back theoretical considerations by showing that a ceteris paribus positive relationship between firm size and direct export activities exists. This note contributes to the literature by closely looking at an econometric modelling issues that has largely been neglected hitherto. Various approaches used in the literature to model the exports/sales ratio, which is a percentage variable with usually many observations at the lower limit, are discussed. It is argued that all these methods are seriously flawed, and an alternative approach is suggested that is applied using data from a large comprehensive recent survey of German manufacturing establishments. Furthermore, the relation between firm size and exports is examined in four selected industries to test whether the importance of economies of scale and transaction cost efficiencies vary considerably between industries.     

20 Jahre Deutsche Einheit

Am 1. Juli 1990 trat die Wirtschafts-, W?hrungs- und Sozialunion der beiden deutschen Staaten in Kraft. Der Prozess des ?konomischen Zusammenwachsens von Ost- und Westdeutschland erwies sich jedoch als schwieriger als erwartet. Warum ist das so? Und was k?nnte getan werden, um in Ostdeutschland eine eigenst?ndige Wirtschaftsdynamik zu etablieren?     

An efficient algorithm for Lindner’s test (configural frequency analysis)

Quality &; Quantity - Lindner’s (Psychologische Beiträge 26:393–415, 1984) test is a generalisation of Fisher’s exact test for 2 × 2 contingency tables to 2 k...