Acknowledgment

Co-Editor-in-Chief Dr. Stan Lipovetsky thanks the referees who contributed in reviewing the papers in 2020:

Raghunath Arnab, University of Botswana, Gaborone, Botswana

Sangeeta Arora, Panjab University, Chandigarh, India

Slava Brodsky, NJ, USA

Wenyaw Chan, The University of Texas Health Science Center at Houston, TX, USA

Navin Chandra, Ramanujan School of Mathematical Sciences, Pondicherry University, India

Peter Congdon, School of Geography, Queen Mary University of London, London, UK

Sergei Dronov, Altai State University, Barnaul, Russia

Paul Garthwaite, The Open University, Milton Keynes, UK

David Hanagal, Pune University, India

Shailja Khanduri, Doon Business School, Selaqui, Dehradun, Uttarakhand, India

Paul Kinyanjui, Department of Mathematics, Egerton University, Egerton, Kenya

Jitendra Kumar, Central University of Rajasthan, Bandersindri, Ajmer, India

Vladimir Ladyzhets, University of Connecticut, Stamford, USA

Artur Lemonte, Universidade Federal do Rio Grande do Norte, Natal, Brazil

Ying Lin, North Dakota State University, Fargo, ND, USA

Igor Mandel, Redviser Inc., New Jersey, USA

Nikita Moiseev, Plekhanov University of Economics, Moscow, Russia

Vasili Nagarjuna, Pondicherry University Pondicherry, India

Ricardo de Oliveira, University of São Paulo, Brazil

Edwin Ortega, San Paolo University, Brazil

Arvind Pandey, Central University of Rajasthan, Ajmer, India

Henry Penikas, Higher School of Economics, Moscow, Russia

Arkady Shemyakin, University of St. Thomas, St. Paul, MN, USA

Adilson da Silva, University of Cape Verde, Praia, Cape Verde

Sarjinder Singh, Dept. of Mathematics, Texas A&M University-Kingsville, USA

A.K.P.C. Swain, Orissa, India

Boris Zaslavsky, FDA, Rockville, MD, USA.

And special thanks to Professor Henry Penikas, the Guest Editor of the MASA special issue v. 15, #4 on the Multivariate Statistics in Applications to Econometrics, in commemoration of Professor Sergey Aivazian and his remarkable contributions to statistics.