The hands down best thing ever for my kids came from Ondrea's nanny. Almost 2 yrs ago, she taught my DD to walk holding onto the stroller. I don't know what is it about that girl, maybe it's because she's not my DD's mommy but my DD did it the first time she told her, and now that my DS ditches the stroller most of the time, he sees sissy doing it, even he insists on holding onto the stroller whenever he walks. It's freakin' awesome! I cannot thank Ondrea's nanny enough for it. Up until then, I've tried kiddie leashes to no avail, I've tried all sorts of things, but nothing worked. If I recall, all she did was show my DD where on the stroller to hold on to (the side) had Ondrea's DS demonstrate it once, and that was that. It was a bit of peer pressure, and a bit of authority from someone else.
14 mos might be a little too young to get them to fully understand they need to stay close but it never hurts to start trying and practicing. My advice would be to go to an empty mall (like Westminster Mall, that place is nearly barren) and set her loose to practice. When my DS first started walking more, I'd always hold his hand and explain to him that he has to hold on to my hand. When he tries to yank away, I just tighten my grip around his fingers and that's his signal to hold my hand again.
If you know someone with an older child who knows what to do, knows to hold hands etc, see if you can gtg with them a few times. Peer pressure works like nothing else when it comes to training. Because DS has an older sister to mirror, I've had far less trouble with him taking off on me than I did with DD.