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Pieter (Jop) WOLTJER

Researcher – Wageningen Economic Research

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Purchasing Power Parity

Article: Is Egypt Really More Productive than the United States?

The Data behind the Penn World Table

ABSTRACT: A new feature in recent versions of the Penn World Table (PWT) is data on comparative levels of total factor productivity (TFP) across countries. TFP is defined as the efficiency with which inputs are transformed into outputs, and differences across countries can be due to factors such as better technology or better resource allocation. Yet, surprisingly, in PWT version 10.0, a number of low-income countries have a TFP level well above that of the United States. Continue reading “Article: Is Egypt Really More Productive than the United States?” →

Working Paper: Inconsistencies in Comparing Relative Prices Over Time

Patterns and Facts

ABSTRACT: Purchasing power parities (PPPs) aim to measure relative price levels across countries, like inflation aims to measure relative price levels over time. Ideally, the change in PPPs over time should be consistent with relative inflation, Continue reading “Working Paper: Inconsistencies in Comparing Relative Prices Over Time” →

Article: Taking Over

A New Appraisal of the Anglo-American Productivity Gap and the Nature of American Economic Leadership ca. 1910

ABSTRACT: This article re-examines how and when the USA closed the gap and ultimately overtook the UK in terms of both labour productivity and real income. On the basis of a set of sectoral productivity benchmarks for the year 1910 Continue reading “Article: Taking Over” →

Working Paper: Taking Over

A New US/UK Productivity Benchmark and the Nature of American Economic
Leadership ca. 1910

ABSTRACT: This paper offers a direct industry-of-origin benchmark for the United States and the United Kingdom around 1910. The industry-of-origin approach allows for a disaggregation of international productivity differentials Continue reading “Working Paper: Taking Over” →

Working Paper: Comparing Productivity in the Netherlands, France, UK and US, ca. 1910

A New PPP Benchmark and its Implications for Changing Economic Leadership

ABSTRACT: This paper presents a new benchmark of output and relative prices (PPPs) for agriculture, mining and five manufacturing branches in the US, UK, France and the Netherlands around 1910. Continue reading “Working Paper: Comparing Productivity in the Netherlands, France, UK and US, ca. 1910” →

Working Paper: A Comparison of Real Output and Productivity for British and American Manufacturing in 1935

ABSTRACT: The manufacturing productivity gap between the U.S. and the U.K. became much larger during the interwar period than existing estimates suggest. This paper presents a new estimate based on real value added and hours worked. Continue reading “Working Paper: A Comparison of Real Output and Productivity for British and American Manufacturing in 1935” →

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