1. The plural of progressivity; the quality or state of being progressive, especially in taxation or policy design where rates or effects increase with income or value.
Usage: Commonly used in economics, tax policy, and social science contexts.; Often refers to tax systems where higher earners pay a larger percentage of their income.
2. Instances or degrees of gradual, continuous improvement or development over time.
Usage: Used in educational, technological, and organizational contexts.

Examples

• The progressivities of different tax systems vary significantly across countries.
• Economists debate the progressivities built into various welfare programs.
• The progressivities in educational reform have shown measurable student gains.
• Tax progressivities are designed to ensure wealthier individuals contribute proportionally more.
• The company's progressivities in technology adoption have kept it competitive.
• Policy makers must balance progressivities in regulation with economic efficiency.