In my ideal world, this is how maternity/paternity leave should be structured (hehe) economic-wise:
(1) full or close to full pay - period to allow mother to recover from effects of childbirth and erm if you are in France, get back in shape. Mother only, but on the basis some women need a shorter time than others, transferable to the father.
(2) less pay - period when baby is still little and getting used to being out of the womb, not properly weaned, mother is bf-ing (if she chooses). Transferable between mother and father.
(3) nominal or no pay but with job protection - where one parents wishes to stay at home during pre-school years. Transferable between mother and father.
It then depends on the priorities of the government of the day how long each period is and the amount of pay linked to each.
At no point is anyone, mother or father, forced to take maternity/paternity leave, whether (1), (2) or (3) beyond say 2 weeks for the mother for health and safety reasons (I believe current UK position).
But if either one decides to do so, the Canadian parental leave position as described by sprogger sounds best ie it can be used entirely by one parent, or consumed by both parents in series or in parallel. The amount of pay depends on who is taking the leave, and which period that parental leave relates/is assigned to.
Whether or not the father is likely to take the leave in reality is a red herring. Like Niecie, I don't agree with the premise that just because men are not likely to take advantage of paternal leave (because they earn more and are less erm maternal) that we should not offer it. The conclusion of the article is fundamentally flawed.
Cushioncover sums it up neatly: "Only when employers know that taking on a man is 'equally as risky' as taking on a woman will woman be on a more even footing" in the workplace. I am also with Eleusis that you start by offering and it is when drip-by-drip men see other men taking advantage of it that it slowly becomes normalised in the workplace for men to stay to care for their children as well. It is nowadays pretty normal for men to take the full 2 week entitlement of paternity leave - that is a recent thing and was not the case before. We are making progress in little steps, as it must be, as business concerns need to be taken into account.