From Human Rights in the Soviet Union by Albert Szymanski. Statistics are from between 1965 and 1979.

General:

• All three Baltic SSRs had a higher income per capita than the RSFSR or the all-Union average. Estonia and Latvia were also higher than Russia in terms of income per adult.
• Latvia and Estonia had more doctors per capita and per adult than the RSFSR or USSR average.
• Estonians were overrepresented by 17% in the amount of scientific workers.

Education and language:

• The number of students in all levels of education doubled in Latvia from 1914 to 1978, increased 140% in Estonia, and increased 420% in Lithuania.
• Estonia had the highest expenditure per student of any Soviet republic, almost 12% higher than the USSR average.
• Estonia and Latvia had the most books published per speaker in their languages of any republic. Lithuania was also higher than any non-Baltic republic besides Russia.
• Citizens of any republic could go all the way through college taking classes in their native language.
• All three Baltic SSRs had a higher percentage of newspapers published in their languages than the percentage of their main nationality in the republic.