We've seen time and again how changes in tax policy can influence behavior. Will that be the case in 2014, given that dividends and capital gains will be subject to a higher top marginal tax rate for the second year running? That's the question Motley Fool contributor John Maxfield discusses in the following video. He specifically considers whether high-yielding stocks like AT&T (T 0.20%) and Verizon (VZ -0.61%) will see their share prices affected by the change.