I didn't like this week's homework. I just couldn't quite figure out how to prove the stationarity of this process. Weak stationarity is trivial, but we don't have joint normality, which would make it follow from that. And I wasn't quite clear how much detail I was supposed to go into when it came to some of these other proofs - there are sketchy proofs in the book which make complete sense, so I think we're supposed to go into detail, but when you try to write the detail, as you write it, it just doesn't make sense to write more because it is so trivially simplified to... what is in the book. It's equivalent to worrying about simplifying (7+3)*4+(6+1)*5 as 40+35 or 10*4+7*5 and then 40+35. Stupid.
YNAB is a great budgeting tool.
Teh Wife and I are thinking of buying a share in a CSA. Woo fresh produce. Any thoughts/advices/knowledges? I was thinking of doing a half share at first to make sure we actually do it, and next year doing a full share. There's a good produce store nearby, so we can easily supplement if it's an insufficient amount of produce. Meat shares and egg shares sound intriguing, but I don't know how practical they are for us, so am interested in feedback.
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