I've seen this question regarding inheritance in Backbone: Backbone.js view inheritance. Useful but doesn't answer my question.

The problem I'm experiencing is this:

Say I have a class Panel (model in this example);

var Panel = Backbone.Model.extend({
    defaults : {
        name : 'my-panel'
    }
});

And then an AdvancedPanel;

var AdvancedPanel = Panel.extend({
    defaults : {
        label : 'Click to edit'
    }
});

The following doesn't work:

var advancedPanel = new AdvancedPanel();
alert(advancedPanel.get('name')); // Undefined :(

JSFiddle here: http://jsfiddle.net/hWmnb/

I guess I can see that I can achieve this myself through some custom extend function that creates a deep copy of the prototype, but this seems like a common thing that people might want from Backbone inheritance, is there a standard way of doing it?