When investing, how frequently and on what dates should I dollar cost average(DCA)?

I get paid twice a month on the 1st and on the 15th. Is there a general rule of thumb on how often I should DCA or to spread out my investments throughout the month? I have about 7-8 mutual funds and I was curious if there was historical data that produced better results rather than what I'm currently doing. Thanks.
Asked Dec 01, 2009

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