The demographic shifts correlate with changes in median income. The neighborhood experienced income volatility, with median income decreasing from $117,947 in 2013 to $76,961 in 2016, before increasing to $148,581 in 2021. This economic fluctuation coincides with the period of most significant racial composition changes.

The lowest median income year (2016) corresponded with the highest Hispanic population percentage (49%). Subsequent years of income growth align with the increasing Asian population and decreasing Hispanic population percentages. This suggests a potential link between the changing racial makeup and the economic profile of incoming residents, possibly related to shifts in the local job market or housing policies.

The increasing Asian population in Nineteenth Avenue aligns with broader trends in Silicon Valley and the San Francisco Bay Area, where Asian communities have grown due to tech industry expansion. The fluctuations in the Hispanic population percentage, peaking in 2016 and then declining, may reflect broader Bay Area gentrification trends, where rising costs displace certain demographic groups.

The median income, despite volatility, has remained consistently high compared to national averages, reflecting the overall affluence of the San Mateo area and its position within the economically robust Silicon Valley region. The 2022 median income of $120,162 is significantly above the national median, highlighting the neighborhood's economic strength despite demographic changes.

Nineteenth Avenue exemplifies a Transitional Community within an economically dynamic region. Its evolution from a White plurality to an Asian plurality, while maintaining Moderate Diversity, reflects broader regional demographic shifts. The correlation between these changes and income fluctuations suggests a complex interplay between racial composition, economic opportunities, and housing market dynamics in this Silicon Valley-adjacent neighborhood.