Previous Year Price Comparison Without Summing

I have a table with three columns.  Price, date and region.  I want to do a year over year comparison on price.  I don't want to sum the price, but just compare.

How do I create a new column that takes the previos years price and compares it to this year for each region?

I tried:

PY Ibase = if (YEAR(InstallBase[Date])=2014, 0, Calculate (SUM(InstallBase[Ibase]), DATEADD('Date'[Date], -1, YEAR), InstallBase[GeoID]=4))  

rve

According to your description, the following formulas should meet your requirement.

PY_Price = 
CALCULATE (
    SUM ( MyTestTable[Price] ),
    SAMEPERIODLASTYEAR ( MyTestTable[Date] ),
    ALLEXCEPT ( MyTestTable, MyTestTable[Region] )
)

Or

PY_Price_2 = 
CALCULATE (
    SUM ( MyTestTable[Price] ),
    DATEADD( MyTestTable[Date], -1, YEAR),
    ALLEXCEPT ( MyTestTable, MyTestTable[Region] )
)

The following sample is for your reference:

Assume we have a table called MyTestTable with 3 columns(Region, Date, Price).

Then we can use the formula I mentioned above to create a measure, and use the measure to show YOY Price change with filter of Date and Region in the report.

Regards