In DISCUSSION #002 — Labor Market Segmentation & Mobility Constraints, we saw that workers do not move freely across sectors, firms, or regions.
Labor markets are segmented, and mobility between segments is often limited.
But labor mobility is only one channel through which productivity spreads across an economy.
Even when workers remain in place, productive knowledge and skills can diffuse through education, training, and the gradual adoption of better technologies and work practices.
The speed and breadth of this diffusion play an important role in shaping the productivity structure of an economy.
Differences in productivity across sectors are often associated with differences in technology or capital intensity.
But productivity also depends on the skills embodied in workers and the organizational practices within firms.
Machines, software, and production techniques are rarely productive on their own.
They become productive when workers know how to use them effectively and when firms organize production efficiently.
For this reason, the formation and transmission of skills are central to the diffusion of productivity.
Skill formation occurs through several institutional channels.
The effectiveness of these channels determines how quickly productive knowledge spreads beyond frontier firms or sectors.
In many economies, the most advanced firms operate at the technological frontier, while other firms operate with older technologies and less efficient practices.
Productivity growth therefore depends not only on frontier innovation but also on the diffusion of those innovations across the broader economy.
When diffusion is rapid, productivity levels across firms and sectors tend to converge.
When diffusion is slow, large productivity gaps persist.
Skill formation and productivity diffusion interact closely with labor market segmentation.
If workers cannot easily move between firms or sectors, the spread of productive practices may depend more heavily on institutional systems of training and education.
Conversely, when mobility is high, knowledge can diffuse through the movement of workers themselves.
Different economies rely on different combinations of these mechanisms.
The institutions that govern skill formation and knowledge diffusion influence how evenly productivity is distributed across the economy.
Some economies exhibit relatively compressed productivity distributions, where firms and sectors operate at similar productivity levels.
Others exhibit wider dispersion, with highly productive frontier firms coexisting alongside much less productive segments.
These differences help explain why structural productivity patterns vary across countries.
The next discussions examine how these mechanisms operate in specific national contexts.
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DISCUSSION #004 — Japan’s Structural Duality vs Germany’s Compression