@techreport{weko_102173_1,
   author	 = "Hiroshi,Ishijima and Takuro,Kazumi and Akira,Maeda",
   title	 = "Quantifying Sentiment for the Japanese Economy and Stock Price Prediction",
   year 	 = "2014",
   institution	 = "Chuo University and Columbia Business School, CyberAgent, Inc., The University of Tokyo",
   number	 = "13",
   month	 = "jul"
}