Dbar = post.mean of -2logL; Dhat = -2LogL at post.mean of stochastic nodes
	Dbar	Dhat	pD	DIC	
y	56.498	60.379	-3.881	52.617	
zero	-12.579	-11.444	-1.135	-13.715	
total	43.919	48.935	-5.016	38.903