The Benefit Determination Guide presents discussions about unemployment insurance law. The discussions are based on state and federal law, state and federal regulations; case law from the United States Supreme Court, the California Supreme Court, lower federal and state courts and Precedent Benefit Decisions issued by the California Unemployment Insurance Appeals Board. There are eight volumes. Each volume provides discussion on one broad issue of unemployment insurance law. Department personnel use the Benefit Determination Guide to make proper decisions about eligibility for unemployment insurance benefits.
An alternative hypothesis of adaptive significance was proposed by Bulmer and Bull in 1982  and supported by the work of Pen et al. (2010). They conjectured that disruptive selection produced by variation in the environment could result in an evolutionary transition from ESD to GSD (Bull, Vogt, and Bulmer, 1982). Pen et al. (2010) addresses evolutionary divergence in SDMs via natural selection on sex ratios. Studying the spotted skink, they observed that the highland population was not affected by temperature, yet, there was a negative correlation between annual temperature and cohort sex ratios in the lowlands. The highlands are colder with a higher magnitude of annual temperature fluctuation and a shorter activity season, delaying maturity, thus GSD is favored so sex ratios are not skewed. However, in the lowlands, temperatures are more constant and a longer activity season allows for favorable conditions for TSD. They concluded that this differentiation in climate causes divergent selection on regulatory elements in the sex-determining network allowing for the emergence of sex chromosomes in the highlands.