text: • BL Lacs and FSRQs do not exhibit signiﬁcant 
  diﬀerences in amplitude of submillimeter vari- 
  ability or characteristic timescale, but our sam- 
  ple of BL Lacs may be dominated by high- 
  peaked BL Lacs (HBLs), which exhibit obser- 
  vational similarities with FSRQs. 
  
  Lacs and FSRQs. One avenue for exploring this dif- 
  ference is to monitor changing submillimeter energy 
  spectral index and the ratio of γ-ray to submillime- 
  ter luminosity as functions of time. The full mean- 
  ing of the results of our autoregressive method is not 
  yet clear, and will require better-sampled blazar light 
  curves and the comparison between τrest with physical 
  timescales such as the synchrotron cooling timescale. 
  These analyses would allow us to place constraints 
  on the processes occurring near the base of the jet in 
  blazars and further understand the intimate connec- 
  tion between them. 
  
  • Blazar submillimeter light curves are consistent 
  with being produced by a single process that ac- 
  counts for both high and low states, with char- 
  acteristic timescales 10 < τrest < 500 days. 
  
  • The blazars detected by Fermi have synchrotron 
  peaks at higher frequencies, regardless of sub- 
  millimeter luminosity. 