How to init model in AnguarJS?

I'm looking way to init model with empty value without ng-init or ugly code in controller (my form model is very huge and contains variable amount of fields).

Please to run sample http://jsfiddle.net/c9Q6Y/

"Serialize" link shows "{}" - empty model if input not touched, and {"name":""} if enter something to imput and clear it.

How to adjust angular to init model fields as empty lines by default?

<div ng-app="">
  <form name="myForm" ng-controller="Ctrl">
      text: <input name="input"  ng-model="user.name">     
   <div>
      <a ng-click="Serialize()">Serialize</a> 
      </div>
       {{serializedUser}}
   </form>
</div>

function Ctrl($scope) {
    $scope.serializedUser = "";
    $scope.user = {};

    $scope.Serialize = function() {
        $scope.serializedUser = JSON.stringify($scope.user);
    }
}