Hi @jstac @mmcky @HumphreyYang

According to our style guide, every subtitle should only capitalize the first letter which is not the case in the following lectures in advanced series

• BCG_incomplete_mkts
• additive_functionals
• amss
• amss2
• amss3
• arellano
• arma
• asset_pricing_lph
• black_litterman
• calvo
• calvo_abreu
• calvo_machine_learn
• cattle_cycles
• chang_credible
• chang_ramsey
• classical_filtering
• coase
• cons_news
• discrete_dp
• dyn_stack
• entropy
• estspec
• growth_in_dles
• hs_recursive_models
• intro
• irfs_in_hall_model
• knowing_forecasts_of_others
• lqramsey
• lu_tricks
• lucas_asset_pricing_dles
• lucas_model
• match_transport
• matsuyama
• muth_kalman
• opt_tax_recur
• orth_proj
• permanent_income_dles
• rob_markov_perf
• robustness
• rosen_schooling_model
• smoothing
• smoothing_tax
• stationary_densities
• tax_smoothing_1
• tax_smoothing_2
• tax_smoothing_3
• troubleshooting
• un_insure