Final answer:
The United States, Japan, and Germany's firms dominate industries with high technical content, especially in high-tech capital equipment and specialized machinery, due to unique and specific skills developed in these countries.
Step-by-step explanation:
The countries whose firms have a strong presence in industries with high technical content are notably the United States, Japan, and Germany. These countries have developed unique and specialized skills in producing high-tech capital equipment and machinery. For example, the United States has shown a comparative advantage in this sector due to advancing technology and has engaged in significant intra-industry trade. Technological changes have shifted production dynamics worldwide toward computer integration into manufacturing processes, and U.S. firms have been at the forefront of these changes, boosting their net exports.
Additionally, the U.S. is involved in exporting specific types of machinery due to the unique skills developed by firms within the country, rather than an overall higher skill level among its workforce. Governments, acknowledging the importance of technology in economic growth, have also played a critical role by sending students and officials abroad for technological insights and by supporting companies with innovative capabilities to utilize the available human capital more effectively.