Annual to Quarterly data - Index & Level

[smurac1986]

Hi,

I am trying to convert two sets of data from annual to quarterly data. The problem is one set of data is in the form of an index (GDP Deflator) and the other is ordinary level data (e.g. Oil price, money supply etc). I was just wondering what two separate data manipulation techniques would be best for this situation. I have tried using Quadratic Match Average on the index data and Quadratic Match Sum on the level data and have two series that look pretty spot on. I was just wondering if these techniques are acceptable with this given data?

Any feedback would be great!!