JQuery, Ajax and namespacing

gistfile1.js

  var callsApp = callsApp || {};

  callsApp.calls = {
    onReady: function() {
      $("button").on("click", this.getCallData); 
    },
    getCallData: function(){
      $.ajax({
        type: "GET",
        url: "/calls/stats.json",
        dataType: "json",
        context: callsApp.calls
      }).done(function(data){
        this.processCalls(data)
      });
    },
    processCalls: function(calls){
      var self = this;
      $.each(calls, function(index, call){
        self.renderCall(call);
      });
    },
    renderCall: function(call){
      $('#stats').append(call.year + " : " + call.week + " : " + call.total + "<br>");    
    }
  };

  $(document).ready(callsApp.calls.onReady())