Portfolio Selection and Comparative Portfolio Analysis of Transportation Services, Hotel and Leisure, and Education Subsectors Against Service Sector in the Philippine Market Using Mean-variance Model. - E. L. Cruz; Michael Nayat Young; T. N. Chuahay; Yogi Tri Prasetyo; Satria Fadil Persada; R. Nadilfatin; M. Contreras (IEEM, 2024)