Some exceptions are NYSE, Nasdaq, and Amex. Multiple appendices are referred to as Appendix A, Appendix B, etc. There should be an abstract of at most one hundred words. Headers and subheads Section headers are left-justified with Arabic numerals. Only the first word is capitalized.
Headers are in boldface type, and subheads are in italics.
A period follows the last numeral. Previous research 2.1. Papers that use similar models 2.1.1. Univariate models 2.1.2. Bivariate models 2.2.