The following was recently posted on the website of the Government Study Commission. Prepared by commission member Jim Miller using data from the Pennsylvania Department of Community & Economic Development and Franklin & Marshall College's Center for Opinion Research, it is a property tax rate comparison between comparably sized Pennsylvania counties that have adopted "Home Rule" and Class 3 Pennsylvania counties that have not, including Lancaster.
The analysis indicates, among other things, that the average adjusted millage rate of non-Home Rule Class 3 Counties (Dauphin, Chester, Berks, Luzerne, York, Westmoreland, and Lancaster) is 5.40, while the average adjusted millage rate for similarly-sized Home Rule counties (Lehigh, Northampton, Delaware, Lackawanna, Allegheny, and Erie) is 5.18.
The data sheet can be found here: http://www.co.lancaster.pa.us/lancastergsc/lib/lancastergsc/Per_Capita_Tax_Comparison-JAM.pdf