Hi,

You need one model class for example NewPaperStatus, and change your code accordingly like this:

public class RepoClass
    {
        public IQueryable<NewPaperStatus> AcceptedPaper()
        {
            var query = (from p in db.Papers
                        from s in p.PaperStatuses
                        from a in p.Authors
                        where s.PaperStatus == "Rejected" && a.IsFirstAuthor == true
                        select new
                        {
                            Title = p.PaperTitle,
                            FirstAuthor = a.AuthorLastName,
                            Status = s.PaperStatus
                        }).Distinct();
            return query;
        }
    }
    public class NewPaperStatus
    {
        public string PaperTitle { get; set; }
        public string AuthorLastName { get; set; }
        public string PaperStatus { get; set; }
    }

Hope this can help