digraph {
	rankdir=LR
	node [shape=circle]
	1 [label="新工人" color=blue]
	2 [label="失业工人"]
	3 [label="就业工人"]
	1 -> 2 [label=b]
	2 -> 3 [label="λ(1-d)"]
	3 -> 2 [label="α(1-d)"]
	2 -> 2 [label="(1-λ)(1-d)"]
	3 -> 3 [label="(1-α)(1-d)"]
}
