With the removal of internal migration restrictions in the European Union in 1992, Europeans have become more sensitive to taxdifferences between countries.
1992年,随着欧盟内部人口迁移限制的解除,欧洲人对于国家间税收的差异变得更加敏感。
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In other words, Americans understand that disparities are needed in a free-market, knowledge-based economy, but they believe those differences should be mitigated by tax policies.